Quality & Testing
Every unit is proven before it's shipped — not sampled, all of them.
100% pre-dispatch leak and load testing is not an add-on service. It's the last step of manufacturing every cylinder, power pack and jack that leaves our facility.
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Pressure & Leak Testing
Every cylinder and power pack is held at 1.5× its rated working pressure for a minimum 5-minute hold, with zero leakage tolerance at all seal points.
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100% Load Testing
Jacks and lifting rams are tested to their full rated tonnage before dispatch — not a sample batch, every single unit.
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Material Traceability
Rod and barrel stock is sourced against mill certificates, with alloy and stainless steel selected to the corrosion and load profile of the application.
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Dimensional Inspection
Bore, rod finish and stroke length are measured against drawing tolerance before assembly — surface finish held to Ra ≤ 0.4 μm on running surfaces.
- Test Pressure
- 1.5 × Rated Working Pressure
- Hold Time
- 5 minutes, zero leakage tolerance
- Load Test
- 100% of rated tonnage / thrust
- Surface Finish
- Ra ≤ 0.4 μm on rod & bore
- Material Traceability
- Mill-certified alloy & stainless steel
- Standards Reference
- Designed to ISO 4413 & ISO 6020/6022 principles
Standards Reference
Designed around ISO 4413 and ISO 6020/6022 fluid power principles.
Our cylinder and power pack designs follow the general rules and safety requirements set out in ISO 4413 (hydraulic fluid power systems) and the mounting dimension standards in ISO 6020/6022, adapted to each customer's specific bore, stroke and pressure requirement.
Engineering FAQ
Straight answers to the specs that matter.
Genuine questions our engineering team gets asked most — on seals, tolerances, testing and standards.
NBR (nitrile) is the standard choice for mineral-oil hydraulic systems up to roughly 100°C and costs less than PU for an equivalent seal profile. Polyurethane holds up far better under abrasion and high-cycle duty — the usual pick for dusty earthmoving or high-speed rod applications. For high-temperature or synthetic-fluid systems, FKM (fluoroelastomer) seals are specified instead. We select seal material against your fluid, temperature and duty cycle rather than defaulting to one type.
Cylinder bores are honed to Ra 0.2–0.8 μm with bore tolerance held to H8/H9. Piston rods are ground and hard-chrome plated (or nitrided) to Ra 0.1–0.4 μm with an h9 rod tolerance — the fits recommended for reciprocating hydraulic seals under ISO 5597. Tighter fits are used for cold-climate or high-pressure applications where seal contraction or extrusion is a risk.
Every cylinder and power pack is proof-tested at 1.5× its rated working pressure for a minimum 5-minute hold, with zero leakage tolerance at any seal point — standard practice across the hydraulics industry, and one we apply to 100% of units, not a sample batch.
Welded-body cylinders handle the highest pressures and suit permanent, high-load installations. Tie-rod construction costs less and allows seals to be replaced in the field — common on presses and general industrial machinery. Telescopic cylinders give a long stroke from a short retracted length, typically for tipper and dump-body applications. We’ll recommend the right construction once we know your pressure, mounting envelope and service-access needs.
Force = Pressure × Area (F = P×A). On the extend stroke, area is the full bore circle; on retract, it’s the annular area between bore and rod. Because seal friction and backpressure absorb some of that force in practice, we size for 85–95% mechanical efficiency rather than the theoretical number — and size toward the higher end of that range whenever the application can’t tolerate a shortfall.
Design follows ISO 4413 (general rules and safety requirements for hydraulic fluid power systems) and ISO 6020/6022 (mounting and port dimensions), with seal housings to ISO 5597 where interchangeability matters. For customers on NFPA/JIC standards, we build to that interchange spec instead — tell us which one your fleet uses when you send an RFQ.