HDCH Series D/A Hollow Plunger Cylinders
Engineering Overview & Structural Features
The HDCH Series Double-Acting Hollow Plunger Hydraulic Cylinders are precision-engineered for heavy-duty tensioning, post-tensioning tendons, cable pulling, structural load testing, and industrial maintenance. Operating at 700 Bar (10,000 PSI) working pressure with capacities from 30 to 150 Metric Tons, the central hollow bore allows tie rods, strands, and cables to pass straight through the cylinder body. Double-acting hydraulic return delivers rapid, controlled retraction under full tonnage, while integrated safety relief valves protect against accidental retract-circuit over-pressurization.
Structural Features & Engineering Advantages
Integrated Safety Relief Valve
A built-in safety relief valve automatically releases pressure when high backpressure or accidental line blockages occur in the retract circuit, preventing catastrophic cylinder rupture and safeguarding personnel.
Hardened Alloy Steel Guide Ring
Full-tonnage stop and guide ring eliminates over-travel risk under full hydraulic thrust while providing rigid lateral support to minimize wear and internal galling from off-center structural loads.
Industrial U-Cup Sealing System
Premium polyurethane U-cup dynamic seals paired with resilient backup rings maintain exceptional sealing integrity under harsh 700 Bar cycling, preventing costly downtime and fluid leaks.
Hardened & Hard-Chromed Plunger
The alloy steel center-bore plunger undergoes precision heat-treatment and micro-polished hard chrome plating, offering exceptional resistance against mechanical abrasion, scoring, and corrosion.
Forged Alloy Body & Baked Enamel
Solid forged high-strength alloy steel barrel is CNC precision-bored and finished with a baked enamel coating, delivering superior corrosion protection across harsh offshore and industrial job sites.
Composite Bearing & High-Flow Couplers
Engineered high-strength composite bearing bands safely absorb severe side loads without damaging internal cylinder walls. Standard heavy-duty 3/8" NPT couplers come complete with protective dust caps.
Dimensional Engineering Blueprint
Dimension designations (A: Collapsed Height, B: Extended Height, D: Outside Diameter, X: Center Hole Diameter, F: Plunger Diameter, P/U/V/Z: Collar & Base Mounting Holes) correspond precisely to the Technical Specifications matrix below.
OEM Cross-Reference & Dimensional Interchangeability
The HDCH-Series is a heavy-duty, double-acting hollow plunger hydraulic cylinder engineered for high-tonnage tensioning, cable pulling, structural load testing, and industrial maintenance. Featuring a full-length center bore, it allows tension rods, pre-stressing strands, and cables to pass straight through the cylinder body for bidirectional pulling and pushing. Rated for 700 Bar (10,000 PSI) across 30 to 150 Metric Ton capacities, double-acting hydraulic return delivers rapid, controlled retraction with integrated safety relief protection. 30 - 150 Ton / 38 - 258 mm Stroke.
Enerpac®, SPX Flow®, Power Team®, Simplex®, Hytorc®, Holmatro® and other brand names are registered trademarks of their respective owners. HydraStark is an independent manufacturer and is not affiliated with, authorized or endorsed by these companies. OEM model numbers are listed for dimensional and specification reference only; please verify fit with our engineers before ordering.
RATED CAPACITY
30 - 150 METRIC TONS
STROKE RANGE
38 - 258 MM (1.5 - 10.15 IN)
RETRACTION MECHANISM
DOUBLE-ACTING, HYDRAULIC RETURN
Real Product Details & Build Quality
Specifications
Model | Capacity @10,000 PSI (700 bar) Metric Ton | Stroke mm | Max. Capacity (Ton) | Effective Area (cm²) | Oil Capacity (cm³) | Closed Height (A) mm | Extended Height (B) mm | Collar Thread (C) | Collar Thread Length (X) mm | Outside Diam. (D) mm | Piston Diam. (F) mm | Piston Inner Thread (O) | Thread Length (P) mm | Base Mounting Hole | Center Hole Diam. (Y) mm | Weight Kg | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Push Ton | Pull Ton | Push cm2 | Pull cm2 | Push cm3 | Pull cm3 | Bolt Circle (U) mm | Thread (V) | Thread Depth (Z) mm | |||||||||||||
| HDCH-307 | 30 | 178 | 33 | 22 | 47.7 | 32.4 | 849 | 577 | 330 | 508 | 4.1/2" - 12 UN | 42 | 114 | 65 | 1 13/16'' -16 | 22 | 92 | 3/8" - 16 UNC | 15.5 | 33.3 | 21 |
| HDCH-3010 | 30 | 258 | 33 | 22 | 47.7 | 32.4 | 1231 | 836 | 431 | 689 | 4.1/2" - 12 UN | 42 | 114 | 65 | 1 13/16'' -16 | 22 | 92 | 3/8" - 16 UNC | 15.5 | 33.3 | 27 |
| HDCH-603 | 60 | 89 | 60 | 39 | 87.4 | 56.2 | 778 | 481 | 246 | 335 | 6.1/4" - 12 UNC | 48 | 159 | 92 | 2 3/4''-16 | 19 | 130 | 1/2" - 13 UNC | 14 | 53.8 | 28 |
| HDCH-606 | 60 | 166 | 60 | 39 | 87.4 | 56.2 | 1451 | 891 | 323 | 489 | 6.1/4" - 12 UNC | 48 | 159 | 92 | 2 3/4''-16 | 19 | 130 | 1/2" - 13 UNC | 14 | 53.8 | 35 |
| HDCH-6010 | 60 | 257 | 60 | 39 | 87.4 | 56.2 | 2246 | 1388 | 438 | 695 | 6.1/4" - 12 UNC | 48 | 159 | 92 | 2 3/4''-16 | 25 | 130 | 1/2" - 13 UNC | 14 | 53.8 | 45 |
| HDCH-1001 | 95 | 38 | 93 | 60 | 135.2 | 87.1 | 514 | 331 | 165 | 203 | - | - | 212 | 127 | 4''-16 | 25 | 178 | 5/8" - 11 UNC | 19 | 79.2 | 33 |
| HDCH-1003 | 95 | 76 | 93 | 60 | 135.2 | 87.1 | 1027 | 662 | 254 | 330 | 8.3/8" - 12 UN | 60 | 212 | 127 | 4''-16 | 25 | 178 | 5/8" - 11 UNC | 19 | 79.2 | 61 |
| HDCH-1006 | 95 | 153 | 93 | 60 | 135.2 | 87.1 | 2069 | 1333 | 342 | 495 | 8.3/8" - 12 UN | 60 | 212 | 127 | 4''-16 | 25 | 178 | 5/8" - 11 UNC | 19 | 79.2 | 79 |
| HDCH-10010 | 95 | 257 | 93 | 60 | 135.2 | 87.1 | 3475 | 2239 | 460 | 717 | 8.3/8" - 12 UN | 60 | 212 | 127 | 4''-16 | 25 | 178 | 5/8" - 11 UNC | 19 | 79.2 | 107 |
| HDCH-1508 | 150 | 203 | 136 | 70 | 196.8 | 102 | 3995 | 2074 | 349 | 552 | - | - | 247 | 152.5 | 4 1/4''-12 | 25 | - | - | - | 79.2 | 111 |
Required System Components
Frequently Asked Questions
Q1How does the HydraStark HDCH compare with the Enerpac RRH?
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How does the HydraStark HDCH compare with the Enerpac RRH?
The HydraStark HDCH range (HDCH Series D/A Hollow Plunger Cylinders) is positioned as an alternative to the Enerpac RRH (OEM part numbers such as RRH-307, RRH-3010, RRH-606, RRH-6010, RRH-1003, RRH-1006). Enerpac is a registered trademark of its owner; the reference is provided for dimensional and technical comparison only. Mounting dimensions, ratings and interfaces are listed in the specification table on this page — please confirm them against your existing equipment, or send us your OEM part number and our engineers will check compatibility before you order.
Q2What are the key specifications of the HDCH?
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What are the key specifications of the HDCH?
Rated Capacity: 30 - 150 Metric Tons; Stroke Range: 38 - 258 Mm (1.5 - 10.15 In); Retraction Mechanism: Double-acting, Hydraulic Return; Center Bore Diameter: Ø 33.3 - 79.2 Mm (full-length Pass-through); Cylinder Construction: High-strength Alloy Steel With Hard Chrome Plunger. Full specifications and dimensions are given in the specification table below.
Q3Which models are available in the HDCH series?
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Which models are available in the HDCH series?
The specification table lists 10 models: HDCH-307, HDCH-3010, HDCH-603, HDCH-606, HDCH-6010, HDCH-1001, HDCH-1003, HDCH-1006, HDCH-10010, HDCH-1508. For non-standard requirements, please describe them in the inquiry form.
Q4How is the HDCH tested before shipping?
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How is the HDCH tested before shipping?
Each unit is tested at 125% of its rated pressure before shipping (700 Bar rated, 875 Bar test pressure). This is above the 100% rated-load test required by ASME B30.1.
Q5What are the lead time, warranty and shipping options for the HDCH?
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What are the lead time, warranty and shipping options for the HDCH?
Lead time is typically 2–3 business days when the model is in stock and 7–35 business days otherwise. Warranty is 12 months after receipt of goods. Shipping is available by sea freight, air freight or international express (DHL, FedEx, UPS). Send your requirements through the inquiry form for an exact quotation and delivery date.