Testimonial: Procurement Management

Praise from a customer in West Africa, who offers services and general procurement management for companies in the mining, engineering and construction equipment and parts industry:

We will definitely be sharing with you enquiries from our customers for Hydraulic Pumps, we really appreciate your service.

Click through on the following links if you’d like to find out more about us and our customers, the markets and hydraulic manufacturers that we deal with and the hydraulic products and services that we can provide.

Testimonial: Tree Surgery and Forestry Contractors

It’s all in a day’s work for the technical team, with praise from a company who carries out all aspects of tree work and hedge cutting after recently ordering a Vivolo gear pump:

Thanks for a very prompt and knowledgeable service, I would certainly use your firm again.

We supply a wide range of hydraulic pump types including: Gear pumpsrotary vane pumpsfixed displacement pumps / screw pumpsbent axis piston pumpsaxial piston pumps,  radial piston pumps. If you’re up against particularly tight time scales or budgets we can offer direct equivalents to many of the better known hydraulic pump brands, and then there’s our hydraulic pump repair service which may also provide an alternative cost-effective solution for you.

Click through on the following links if you’d like to find out more about us and our customers, the markets and hydraulic manufacturers that we deal with and the hydraulic products and services that we can provide.

Hydraulic Repairs at the South Pole

We support businesses and customers all over the world, and now we can add the South Pole to our list…

As an ISO 9001 accredited company, we pride ourselves on delivering high quality hydraulic equipment and a service that is second-to-none – it’s the reason our customers place their trust in us, and keep coming back from all over the world!

Unlike some suppliers, we don’t expect you to know what you’re looking for… that’s what we’re here for; our experienced team can identify and select the best equipment for your application. Even if the product you’re after is seemingly discontinued or obsolete, or you’re working with an unrecognisable piece of equipment, we can usually work miracles and can still find a replacement or equivalent!

In some cases, we may even be to perform a hydraulic repair on your existing equipment as a cost-effective alternative. Our hydraulic repair service offers you an evaluation of your faulty unit and a full diagnosis of the potential repair work required. We will let you know which parts can be recovered and reused before we start the repairs.

Back to our new customer down in Antarctica…

When we say we trade the world over, we aren’t joking! A recent enquiry came from a new customer in Antarctica, who sent the team a photo of a hydraulic pump. Not knowing what they wanted and with the identification plate missing from the unit, the team were tasked with finding out what type of hydraulic pump it was. We never back away from a challenge!

Surely enough, the team identified the pump as a Denison P Series tandem pump and were able to quote on a seal kit to needed to undertake some important repairs on the pump; the pump came from a pristine environment into which the unit had been leaking – a repair was essential.

But sometimes a repair may just not be feasible, providing poor or unreliable performance at best. If this is what we find, we will always contact you to explain why and to quote for a brand new replacement pump.

There are a huge range of manufacturers from around the world, designing and making a variety of hydraulic pumps including: gear pumpsrotary vane pumpsfixed displacement / screw pumpsbent axis piston pumpsaxial piston pumps,  radial piston pumps. As well as offering pumps from all the major brands, we also offer direct equivalents to some of the more well-known hydraulic pump manufacturers… particularly useful if you’re up against tight deadlines, timescales or budgets.

Some of the popular hydraulic pump manufacturers and brands that we can supply, and in many cases offer direct equivalents to include: Adan hydraulic pumps, Atos, Bosch Rexroth, Breuninghaus hydraulic pumps, Bucher, Casappa hydraulic pumps, Commercial, Continental hydraulic pumps, Dowty hydraulic pump, Dynapower, Eaton, Eaton Vickers, Hamworthy, Hydromatik, Kawsaki, Linde, Parker hydraulic pumps, Permco, Poclain, Racine, RHL, Sauer Danfoss / Sauer Sundstrand hydraulic pumps, Salami hydraulic pumps, Tyrone, Uchida hydraulic pumps, Vickers and White hydraulic pumps.

Hydraulics CatalogueIf you want to find out more about hydraulic pumps, you can visit our main site here. You can also browse through our catalogue to see some of the hydraulic pumps and other components we have within our range. If you can’t find what you’re looking for then call us or complete our Stock Enquiry Form. Alternatively, you can contact us through our online chat in the bottom right-hand corner of our site.

Testimonial: Cattle Breeders, USA

“This has been one of the best experiences we have ever had trying to find parts for our farming operation. Ian was extremely helpful with our purchase across the pond… a new experience for these old farmers.

Thanks to everyone for the fast and quality service.”

Some lovely feedback we received from Beefmaster cattle breeders in Tennessee, USA after they took delivery of a KYB hydraulic gear pump!

Hydraulics CatalogueFor more case studies and testimonials click here. Visit our catalogue to see some of the hydraulic components we have within our range. If you can’t find what you’re looking for then call us or complete our Stock Enquiry Form.

Testimonial: Polyurethane Processing Technology Specialists

“I must say, you are a good company to work with and I will be using you in future.”

Feedback from one of our new customers (global specialists in polyurethane processing technology and technical support), looking for a number of counterbalance valves!

Hydraulics CatalogueFor more case studies and testimonials click here. Visit our catalogue to see some of the hydraulic components we have within our range. If you can’t find what you’re looking for then call us or complete our Stock Enquiry Form.

Hydraulic Gear Pump

Looking for a hydraulic gear pump? We offer extensive access to a vast range of hydraulic manufacturers from around the world…

Hydraulic manufacturersParker, Roquet, Bosch Rexroth, Casappa, Eaton, Caproni, Turolla, Vivoil Vivolo, Ronzio, Salami and Bondioli and Pavesi are just some of the hydraulic gear pump brands that we regularly supply.

The technical team here at Hydraulics Online have more than 75 years’ combined experience between them, so don’t worry if you don’t know what you’re looking for, or can’t identify an existing pump that you’re trying to replace. Leave that to us. And with our ISO 9001 accreditation, you can relax knowing that you’re in capable hands.

Hydraulic gear pump

Large or small, a hydraulic gear pump is a simple and economical pump that creates pressure through the meshing of the gear teeth, forcing fluid around the gears to pressurize the outlet side. They may be quite loud during operation, but modern gear pumps are hugely dependable and much quieter than their older counterparts.

A hydraulic gear pump can be found in a variety of hydraulic systems. They have few moving parts, work effortlessly, and operate easily even with pressures of up to 250 bar. The displacement chambers are located between the housing of the pump and the rotating gear wheel.

There are two main types of hydraulic gear pump…

External hydraulic gear pump

External gear pumps – These pumps are typically found in industrial and mobile applications, e.g. log splitters and lifts. Some of the features of this pump include:

  • Light-weight;
  • High working pressures;
  • Variety of speeds;
  • Large temperature and viscosity range (i.e. flexibility);
  • Low cost.

Internal hydraulic gear pump

Internal gear pumps – These pumps are used predominantly in non-mobile applications e.g. machine tools and presses or fork-lifts. Key features of the internal gear pump include:

  • Low flow pulsation;
  • Decreased operating noise;
  • High efficiency.

Hydraulics CatalogueAs we said, if you’re not sure what sort of pump would be suitable for your application that’s no problem for our technical team; we are always up for a challenge and can usually work miracles with unrecognisable or seemingly obsolete hydraulic pumps and equipment too. We also undertake hydraulic pump repairs and refurbishment and can often offer “direct equivalents” where it is more cost-effective to do so. Don’t forget to visit our catalogue to see the different types of hydraulic gear pump we supply.

Parker Valves

If you’re searching for Parker valves, look no further – Parker have a wide range of hydraulic valves for a variety of mobile and industrial applications… And we distribute worldwide.

Parker HydraulicsParker Hannifin are one of the world’s most prominent hydraulic manufacturers of motion and control technologies; Parker valves are used in hydraulic, pneumatic, instrumentation, refrigeration and aerospace applications, and they come in a range of types and configurations. They can be manual, motor actuated or solenoid air operated and electrically actuated and mounting configurations can be sub-based, in-line or manifold.

The range of Parker valves comprises:

Parker valves - hydraulic cartridge valvesParker Hydraulic Cartridge valves: Hydraulic load and motor control valves, hydraulic logic element valves, hydraulic solenoid coils and valve drivers, hydraulic line bodies, manifolds and cavities, hydraulic manual valves, hydraulic solenoid valves and hydraulic slip-in cartridge valves.

Parker valves - hydraulic check valvesParker Hydraulic Check Valves: These Parker valves are unidirectional flow devices used primarily in hydraulic systems to eliminate potential damage caused by fluid back pressure. There are one- and two-stage poppets available, with pilot ratios of 1 : 5 and 1 : 40 to suit different operating conditions.

Parker Hydraulic Directional Control Valves: Parker offers the industry’s largest selection of hydraulic directional control valves for markets including: machine tools,
Parker valves - directional control valvespower generation, metal forming, compacting and baling, materials testing, ground support and primary metals processing. Parker provides solenoid controlled as well as manually operated valves controlled by levers, cams, air or oil pilot. These Parker valves are some of industry’s most adaptable, with a large number of coil termination options available. The range includes: hydraulic pilot operated directional control valves, hydraulic solenoid operated directional control valves, hydraulic CAM operated directional control valves, hydraulic Exectrol directional control valves and hydraulic Lo-Torque directional control valves.

Parker valves - flow control valvesParker Hydraulic Flow Control Valves: Parker’s hydraulic flow control valves are known throughout the industry for their performance and reliability. Parker valves are used in a range of applications such as conveyors, food processing machines and material handling equipment… ensuring velocity by guaranteeing consistent flow regardless of load. Flow control valves come in a variety of materials including stainless steel, brass and carbon steel.

Parker valves - hydraulic mobile valvesParker Hydraulic Mobile valves: Parker manufactures hydraulic mobile valves for virtually every mobile equipment application, from simple on/off functions to precise motion control. These include bankable control valves, motion control valves, remote controllers, directional valves and manifold mounted directional and proportional valves.

Parker valves - 6N needle valveParker Hydraulic Needle Valves: Parker offers hydraulic needle valves for speed controls on hydraulic and pneumatic systems where a reverse flow check is not needed. They provide excellent control and a reliable shutoff in a very small envelope. A two-step needle allows fine adjustment at low flow by using the first three turns of the adjusting knob. The next three turns open the valve to full flow, and also provide standard throttling adjustments.

Parker vavles - pressure control valvesParker Hydraulic Pressure Control Valves: These Parker valves include pressure control valves, pressure reducing valves and pressure relief valves.

Parker valves - hydraulic proportional valvesParker Hydraulic Proportional Valves: Parker proportional valves employ powerful voice-coil valve technology, which allows higher flows from smaller valves. These Parker valves offer extremely high response up to 300 Hz, and are offered with or without on-board control electronics

Parker vavles - hydraulic seat valvesParker Hydraulic Seat Valves: Parker offers a complete line of hydraulic seat valves designed for directional control functions. They enable individual hydraulic solutions for nominal flow up due to a large variety of poppets, springs and covers, including shuttle valves, stroke limiters, solenoid valves and position control.

Parker Hydraulic Sequence ValvesParker’s sequence valves are used to control the sequence of operation of two or more hydraulic actuators. The sequence valve pressure is set higher than the first actuator operation pressure. Once the first actuator has completed its cycle, the sequence valve opens, allowing the second actuator to move. Parker’s line of pilot-operated sequence valves include a series of internally piloted, externally drained valves and a series of externally piloted, internally vented valves.

Parker Hydraulic Shuttle Valves;

Parker valves - hydraulic spool valvesParker Hydraulic Spool Valves: Parker’s sequence valves are used to control the sequence of operation of two or more hydraulic actuators. The sequence valve pressure is set higher than the first actuator operation pressure. Once the first actuator has completed its cycle, the sequence valve opens, allowing the second actuator to move. Parker’s line of pilot-operated sequence valves include a series of internally piloted, externally drained valves and a series of externally piloted, internally vented valves.

Hydraulics Catalogue

Parker is only one of many brands that we supply; have a look at some of the hydraulic valves that we regularly supply by hopping over to our catalogue. If you’d like to make an enquiry or are simply looking for more information, then call us to speak to one of our friendly technical team or you can enquire online.

In the meantime, we’ll just leave this here; it’s just one of dozens of testimonials we have that you can see:

Thank you for your email and receipt for the hydraulic valve we ordered. I was very pleased with the prompt service received… very efficient and helpful in identifying the correct part we needed. We will most definitely use your company again.

Parker Pumps

With our competitive access to a vast range of hydraulic equipment manufacturers and over 75 years’ technical experience behind us, it’s hardly surprising that our customer base covers such a vast range of industries and applications all over the world…

In fact if you named a market or country, we’re confident that we’ll be able to tell you about a customer or project that we’ve been involved with. We do, however, seem to attract a great deal of custom from marine, ship management and offshore services companies. Take, for example, the case of this overseas company looking for Parker pumps for one of their vessels…

The company, whose vessels are used in offshore operations for one of the largest oil producers in the world, first contacted Hydraulic Online when they needed a number of Parker pumps – Denison T6C Series vane pumps – for one of their vessels.

Parker HydraulicsDenison Hydraulics is part of the Parker Hannifin group, and as such a leading industrial manufacturer who provides highly engineered hydraulic fluid power systems and hydraulic equipment that can be found in a multitude of applications ranging from: mobile equipment used in the construction, demolition, agricultural, mining and utilities industries to machinery found in industrial manufacturing and marine equipment for commercial and military ships alike.

T6 T67 T7 Parker pumpsDenison vane pumps remain operational at pressures exceeding 4,500 pounds per square inch, differ in size from 0.35 cubic inches to 16 cubic inches, and in displacement from 1 to 250 gallons per minute. These Parker pumps, considered to be some of the toughest components in the industry, are often recognised by their distinctive double-lip design, where the vane is in contact with the cam ring at two points as opposed to one, which is the single-lip design. This double-lip design decreases the vulnerability to contamination when compared to single-lip pumps.

You can find more information on the full range of Commercial Hydraulics Parker pumps by clicking here. 

Anyway, back to our customer… we quoted for the T6 Parker Pumps (and some Veljan vane pumps as well), apparently beating off competition from another overseas supplier local to our customer. And the rest is history…

Bow thrusterBut it doesn’t stop there… the customer was so impressed with our service, that they immediately asked us to quote for a replacement double servo pump that to be used on the bow thruster system on another one of their vessels. Thrusters are mounted to the bow of the vessel to make docking easier; they enable the ship to turn to port or starboard side, without having to use the main propulsion mechanism which involves some forward motion for turning.

Parker servo pump

As is often the case, the customer sent in a photo (shown here) and asked our technical team to identify their existing pump (Commercial Hydraulics P31 series, Parker pumps) and quote for a replacement unit… which we did. The customer received their replacement pumps within a week of placing their order and quickly had the vessel back servicing oil rigs in the North Sea!

Our customers really are our best advocates, and we have plenty more case studies and testimonials, if you would like to take a look… Maybe your story might feature in our growing library one day too?

Parker Gear Pump

Even before becoming part of the Parker Group, Commercial Hydraulics was thought of as one of the world’s biggest names in gear pump manufacturing. And now with the Parker name behind them, Commercial Hydraulics continue to lead the way – their gear pump series regularly referred to as the industry standard against which others are measured.

Parker Commercial Hydraulics

A Parker gear pump is still made to the same demanding standards set by Commercial Hydraulics – the only difference being that the old Commercial product codes are now preceded by “PG” (for Parker Group).

The Parker gear pump / motor range comprises:

Parker gear pump P30 P50 P75

  • P30, M30, PGP30, PGM30, P31, M31, PGP031, PGM031;
  • P50, M50, PGP050, PGM050, P51, M51, PGP051, PGM051;
  • P75, PGP075, PGM075, P76, PGP076, PGM076.

Designed for high-torque applications, the P30, P31, P50, P51, P75, P76 Parker gear pump series offer a wide variety of drive shafts, with unique pressure-balanced thrust plates contributing to optimal performance. Manufactured with hi-tensile grey iron, such a Parker gear pump can be supplied in single and multiple section configurations, with a choice of (relief) valve options.

Parker Gear Pump P315 P330 P350 P365

  • P315, PGP315, PGM315;
  • P330, PGP330, PGM330;
  • P350, PGP350, PGM350;
  • P365, PGP365, PGM365.

The PGP / PGM 300 Parker gear pump series delivers superior reliability and performance in even the most demanding of heavy-duty hydraulic applications. The three-piece cast iron construction with large area, low-friction bushings means that this Parker gear pump series provides strength, high efficiency, and long life in severe operating environments. The design includes an advanced thrust plate and seal configuration, which optimizes performance even in high temperature and low viscosity conditions.

Here at Hydraulics Online, we know that time and money are precious commodities, and that in a “real time” world that never sleeps, you can often find yourself needing something “yesterday” … with a budget under pressure to stretch ever further. Again. That’s why we also offer a range of completely interchangeable, direct equivalents to the Commercial Parker gear pump range. Built and tested here in the UK, you can be assured of a quality product that can more often than not be dispatched within 24 hours.

Our experienced technical sales team are a lovely bunch and will be more than happy to advise you on Commercial / Parker gear pumps if you are looking for more help and technical guidance… Or even a miracle!

Parker gear pump P76And in the meantime we’ll close with this unsolicited “thank you” from a new customer, received after they took delivery of their Parker P76 gear pump. They have since ordered another to hold as a spare:

Dear Ian,

I write to thank you for your assistance in delivering a replacement Parker tandem pump for our vessel “Adeline”.  The pump was installed on the main engine reduction gearbox this morning and has been successfully tested in all operating modes.  Your help was much appreciated, good weekend to you and your team.

Technical Director – Worldwide ship management services company.

Hydraulic Cylinder

Whether you’re looking for a single or double-acting, tie-rod, marine, subsea or welded hydraulic cylinder, something standard or made-to-order, we have it covered…

Better still, you can relax knowing that you’re dealing with a company with over 75 years’ technical experience, backed by ISO 9001 accreditation… and that means that you’re in safe hands. We never compromise on quality. Ever.

… I searched for ages to find the right size hydraulic cylinder and you guys came up trumps. Excellent service… really helpful.

If you’re looking for a “standard” hydraulic cylinder, then hop over to our catalogue where we showcase some of the more popular hydraulic cylinders we have on offer:

Hydraulic cylinder catalogue

If you can’t find what you’re looking for, you can always contact one of our hydraulic engineers – they love to talk – or fill in a stock enquiry form. If you’re looking for something a bit different, then our Bespoke Hydraulic Cylinder Design Form will help you capture the information we need to design a custom-made hydraulic cylinder tailored to your specific requirements and operating parameters. Just fill in as much as you can… we can work through the rest together afterwards.

Let’s take a quick look at the different types of hydraulic cylinder design available…

Tie Rod Cylinder: Tie rod style hydraulic cylinders use high-strength threaded steel rods to hold the two end caps to the cylinder barrel. This technique is most often seen in industrial factory applications. Small bore cylinders usually have 4 tie rods, while large bore cylinders could need as many as 16 or 20 tie rods to be able to keep the end caps under the extreme forces generated.

Welded Cylinder: A welded body hydraulic cylinder doesn’t have tie rods. The barrel is welded directly to the end caps; the ports are welded to the barrel; the front rod gland is then usually threaded into or bolted to the cylinder barrel. This enables the piston rod assembly and the rod seals to be removed for service.

Telescopic Cylinder: The length of a hydraulic cylinder is the total of the stroke, the thickness of the piston, the thickness of bottom and head and the length of the connections. If this total length does not fit in the space available, then a telescopic hydraulic cylinder enables the piston rod to also be used as a piston barrel housing a smaller second piston rod.

Plunger Cylinder: A plunger cylinder can only be used as a pushing cylinder; the maximum force is piston rod area multiplied by pressure. This generally means that a piston cylinder has a relatively thick piston rod.

Differential Cylinders: A differential hydraulic cylinder moves like a normal cylinder when pulling. However, If the hydraulic cylinder has to push, the hydraulic oil from the piston rod side of the cylinder is not returned to the reservoir, but instead is forced to the bottom side of the cylinder. This means the cylinder moves much faster, but the maximum force the cylinder can give is like a plunger cylinder. A differential cylinder can be manufactured like a normal cylinder, only a special control is added.

Rephasing Cylinders: Rephasing hydraulic cylinders are a combination of two or more cylinders plumbed in series or parallel, with the bores and rods sized such that all rods extend and/or retract equally when flow is directed to the first, or last, cylinder within the hydraulic system. In “parallel” applications, the bore and rod sizes remain the same, and the hydraulic cylinders are always used in pairs.

Single and Double-Acting Cylinders: A double-acting hydraulic cylinder is a cylinder in which the working fluid acts alternately on both sides of the piston. It has a port at both ends, provided with hydraulic fluid for both the retraction and extension of the piston. A double-acting hydraulic cylinder is used where an external force is not available to retract the piston or where high force is required in both directions of travel. With a single-acting cylinder, when fluid flow is applied to a port in the closed end, the shaft extends until the collar or piston reaches the shaft end. When an external weight or load is placed on the shaft, the shaft will retract into the chamber until the piston or collar reaches the closed end. The cylinder generates an output force at the shaft end in proportion to its internal closed end area multiplied times the pressure potential of the fluid power system.

Can you let the boys know that they are providing us with great service, parts and information in all our locations. Your service is prompt and reliable; you’re our “go to” guys when it comes to hydraulics.

We’ve supplied hydraulic cylinders to customers all over the world, literally, in a vast range of markets…

Hydraulic Cylinders… including an international refuse and waste management services company who needed a number of 3-stage telescopic, double-acting hydraulic cylinders, and a power transmission equipment manufacturer who needed a complete hydraulic system and hydraulic cylinders for a tipping hopper application.

Welded Hydraulic Cylinders

Then there was the new overseas customer, a leading product design and manufacturing company within the renewable energy industry, who contacted our technical team needing support on a new product development project. Having used a tie-rod cylinder within one of their product designs before, they wanted to prototype a welded construction hydraulic cylinder instead. The cylinders (pictured right) were made to order for the customer… Remember that bespoke cylinder design service we spoke about?

 

These bespoke double-acting hydraulic cylinders pictured were designed as part of a bigger system design project for a new prototype machine for a British Original Equipment Manufacturer. We love bringing ideas to life!

 

And finally… If you’re just looking for technical information, then the good news is that we have a number of articles that may be of interest: how hydraulic cylinders work, hydraulic cylinder maintenance, hydraulic cylinder seals, hydraulic cylinder testing, hydraulic cylinder repair and hydraulic cylinder storage.

Blog & Case Studies

International Hydraulics – Ain’t no Mountain High Enough!

Here at Hydraulics Online we always like to go the

June 13, 2017 read more

News Archive

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Testimonials

Testimonial: Procurement Management

Praise from a customer in West Africa, who offers services and general procurement management for companies in the mining, engineering and construction equipment and parts industry: […]

Testimonial: Tree Surgery and Forestry Contractors

It’s all in a day’s work for the technical team, with praise from a company who carries out all aspects of tree work and hedge […]