RCH series cylinders
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RCH hollow plunger cylinders
RCH Series are single-acting steel cylinders with a spring return. Most of these cylinders feature base mounting holes, collar threads, and are finished with a durable baked enamel outer coating.
Hollow plunger hydraulic cylinders (also known as center hole cylinders) provide a versatile solution for tensioning, testing, pulling, and lifting. A hollow plunger hydraulic cylinder allows for both pulling and pushing forces. Single-acting and double-acting models are available, with cylinder bodies made of high-alloy steel or anodized aluminum. These cylinders are fully compliant with the ASME B30.1 standard (except for the BRD-RD series).
Enerpac RCH series hydraulic cylinders – hollow plunger cylinders (700 bar)
Enerpac RCH series hydraulic cylinders (single-acting cylinders with hollow plunger and spring return, Enerpac Hollow Plunger Cylinders – Holl-O-Cylinder) are versatile power hydraulics devices designed to generate highly controlled pushing and pulling forces. The unique center-hole design running through the entire length of the plunger allows for the passing of cables, rods, pull bolts, and tension members, making these cylinders an indispensable tool for cable tensioning, flywheel and gear pulling, anchor testing, and pressing. RCH series cylinders operate at a maximum working pressure of up to 700 bar (70 MPa), offering a capacity range from 12 to 100 metric tons (from 125 kN to 931 kN) and plunger strokes from 8 mm to 155 mm. Equipped with a heavy-duty return spring, they ensure rapid plunger retraction after pressure release. The durable steel body coated with a lasting baked enamel, nickel-plated or hardened plunger, and collar and mounting threads guarantee trouble-free and safe operation in the toughest industrial and workshop conditions.
Applications and technical characteristics of Enerpac RCH series cylinders
Enerpac RCH hollow plunger cylinders are widely used in machine service, heavy industry, construction, and research laboratories. The hollow plunger design allows for direct force transfer to through-elements without the need for complex levers and beams.
- Hollow plunger design (Holl-O-Cylinder): The through-hole allows a rod or cable to pass through, enabling both pulling and pushing operations with a single device.
- Maximum operating pressure 700 bar: The highly efficient hydraulic system generates forces from 125 kN (for RCH-120/121) up to 931 kN (for RCH-1003).
- Single-acting with spring return: The built-in return spring ensures efficient and automatic retraction of the plunger to the starting position once the release valve is opened.
- Mounting versatility: Threaded collar threads, threaded plunger insides, and base mounting holes facilitate quick installation of the cylinder in fixtures and on test stands.
- Wide range of accessories and interchangeable saddles: The availability of optional hardened threaded saddles (e.g., HP series) protects the plunger rod from deformation under load.
- High-flow CR-400 quick couplers: Standard equipment with a 3/8"-18 NPTF coupler and dust cap ensures quick and safe connection to pressure hoses.
Why choose Enerpac RCH series cylinders at HYDRON?
As an authorized supplier of Enerpac equipment, HYDRON guarantees access to 100% original, brand-new RCH series hollow plunger cylinders, manufactured in accordance with ASME B30.1 and CE standards. Precise component fitting and high wear resistance ensure these cylinders reliably withstand repeated duty cycles. Selected models are also available in ready-made factory sets including the cylinder, hand pump, hose, gauge, and adapter. To build a complete and reliable pressure system, we recommend selecting other compatible products from our offer, such as original Enerpac hydraulic tools and cylinders, efficient 700 bar hydraulic pumps, flexible high-pressure hoses and lines and leak-free 700 bar hydraulic quick couplers.
Technical specification
Technical parameter | Value / Description |
|---|---|
Product category | Enerpac RCH series hydraulic cylinders (with hollow plunger) |
Operation mode / Plunger return | Single-acting with spring return (Spring Return) |
Maximum operating pressure | 700 bar (70 MPa / 10,000 PSI) |
Nominal capacity range | from 12 to 100 metric tons (from 125 kN to 931 kN) |
Plunger stroke range | from 8 mm to 155 mm |
Center hole diameter (hollow) | from 17.3 mm to 79.0 mm (depending on model) |
Hydraulic connection standard | CR-400 quick coupler (3/8"-18 NPTF) with dust cap |
Compliance with standards and certificates | ASME B30.1, CE, ISO 9001 |
Frequently Asked Questions (FAQ)
What is the Enerpac RCH series hollow plunger cylinder used for?
The hollow plunger cylinder (Holl-O-Cylinder) has a center through-hole that allows for the passing of tension members, cables, or threaded rods. It is used to generate high pulling and pushing forces during gear removal, cable tensioning, bushing extraction, and anchor load testing.
What are the most important advantages of RCH single-acting cylinders?
The main advantages are the through-hole design, high 700 bar operating pressure, spring return for easier operation with a single hose, and numerous mounting threads on the body and plunger for easy attachment to fixtures.
How does the RCH series differ from the RRH series?
The RCH series consists of single-acting cylinders equipped with a return spring. The RRH series consists of double-acting cylinders with hydraulic forced return, which accelerates plunger retraction during long cycles or in tough conditions.
Which hydraulic pumps are recommended for powering RCH cylinders?
700 bar hydraulic pumps designed for single-acting devices are dedicated to powering RCH series single-acting cylinders – from manual pumps (e.g., P-392, P-80) to pneumatic (PA / Turbo II) and electric pumps (ZU4 / ZE / E-Pulse series).