Home/ENGINEERING SIZING & SYSTEM SELECTION

700 BAR HIGH-PRESSURE HYDRAULIC SIZING GUIDE (2026 EDITION)

Engineering Sizing & System Selection Matrix

Step-by-step engineering calculation formulas, cylinder tonnage sizing, reservoir oil volume matching, and torque wrench selection methodologies strictly aligned with genuine manufacturer technical catalogs.

SECTION 01//HYDRAULIC CYLINDERS & JACKS

How to Choose the Right Hydraulic Cylinder System

Derived from Catalog Page 3 engineering guidelines. Sizing a safe lifting or pressing solution requires evaluating working loads, installation clearance, multi-point distribution, and mechanical load holding.

01LOAD CALCULATION

1. Capacity & Safety Factor

Never size a cylinder at 100% of maximum static capacity. Always apply a 1.25 to 1.50 safety margin to account for shifting centers of gravity, dynamic shock loads, and mechanical friction.

Formula:F_req = Load (Ton) × 1.25

For multi-cylinder lifting, divide load across cylinders considering uneven distribution.

02CLEARANCE ENVELOPE

2. Stroke & Collapsed Height

Measure minimum insertion clearance. If vertical room is restricted, standard cylinders will not fit. Select from four distinct profile classes tailored for low-clearance tasks.

Standard Clearance:HSC (5-100T)

Low-Height Profile:HSCL (10-100T)

Flat Pancake Jack:HSCF (5-150T)

Ultra-Thin 1500 Bar:HSCU (56-207T)

03ACTUATION DYNAMICS

3. Push vs. Pull Actuation

Determine if load retraction requires powered hydraulic control, or if simple single-acting spring return is sufficient.

SINGLE-ACTING (S/A)Hydraulic push, internal mechanical spring return. Simplest plumbing with 1 hydraulic hose line.

DOUBLE-ACTING (D/A)Hydraulic powered push and pull. Essential for horizontal jacking, pulling loads, or rapid cycle speed.

04SPECIAL GEOMETRY

4. Hollow Plunger vs. Lock-Nut

Specialized industrial applications require dedicated mechanical mechanisms for post-tensioning rods or positive mechanical safety holding.

HOLLOW PLUNGER (HSCH / HDCH)Center-hole design allows cables, tie-rods, or anchor bolts to pass directly through for tensioning.

MECHANICAL LOCK-NUT (HSC-LN)Screw-down collar supports load purely mechanically for days/weeks with zero hydraulic pressure.

05ALLOY SELECTION

5. Steel vs. 7075-T6 Aluminum

Evaluate whether operators must manually carry the cylinder between work points or up scaffolding.

7075-T6 AIRCRAFT ALUMINUM (HSCA)Reduces tool weight by ~50%. Equipped with hard-anodized finish and steel base protection plate.

FORGED ALLOY STEEL (HSC / HDC)Maximum yield strength and resistance to extreme abrasive field conditions and heavy side loads.

06SAFETY ACCESSORY

6. Tilt Saddle for Side Loads

Side load is the #1 killer of hydraulic cylinders. Uneven ground or structural deflection causes plunger scoring and seal blowout.

5° SELF-ALIGNING TILT SADDLEWhenever lifting structures with potential angle deflection, install an optional 5° tilt saddle to distribute force evenly across the plunger face.

HydraStark Cylinder Series Quick Recommendation Matrix

700 BAR RATED

Series Code	Action Type	Tonnage Range	Stroke Range	Key Distinguishing Feature	Direct Spec
HSC Series	Single-Acting, Spring Return	5 - 100 Ton	25 - 362 mm	Standard universal shop & construction workhorse	View Specs >
HSCL Series	Single-Acting, Spring Return	10 - 100 Ton	38 - 62 mm	Low closed height for confined machine leveling	View Specs >
HSCF Series	Single-Acting, Spring Return	5 - 150 Ton	6 - 16 mm	Ultra-flat pancake profile down to 32 mm closed height	View Specs >
HSCH Series	Single-Acting, Spring Return	13 - 100 Ton	8 - 155 mm	Center-hole hollow plunger for cable & tie-rod pulling	View Specs >
HDC Series	Double-Acting, Hydraulic Return	10 - 300 Ton	57 - 511 mm	Dual-port powered extension & retraction for high-cycle jigs	View Specs >
HSC-LN Series	Single-Acting with Lock Nut	50 - 1000 Ton	50 - 300 mm	Threaded mechanical safety collar for sustained structural holding	View Specs >
HSCA Series	Single-Acting Aluminum	20 - 150 Ton	50 - 250 mm	7075-T6 aerospace aluminum, 50% lighter than equivalent steel	View Specs >

SECTION 02//HYDRAULIC PUMPS & RESERVOIR SIZING

Hydraulic Pump Flow & Oil Volume Matching Guide

Derived 100% from Official Catalog Page 26. Avoid dangerous cavitation by matching usable reservoir volume to cumulative cylinder oil displacement, plus selecting between 2-stage manual, electric, and pneumatic power units.

RULE 1: OIL RESERVOIR CAPACITY

Usable Oil Volume Calculation

When cylinder plungers extend, oil is withdrawn from the pump tank. The pump’s usable oil capacity must exceed the total combined oil displacement of all connected cylinders and hydraulic hoses by at least 25% to 30% to prevent air intake into the high-pressure element.

V_usable ≥ ∑ (Cylinder Effective Area × Stroke) × 1.30

Note: Add ~100-250 ml oil allowance for long 6m - 10m high-pressure flexible hoses.

RULE 2: VALVE CONFIGURATION

3-Way vs. 4-Way Directional Valves

Valve selection must strictly match cylinder action type to prevent catastrophic over-pressurization of low-pressure retract lines.

3/3

3-WAY / 3-POSITION VALVE (Advance / Hold / Retract)Designed exclusively for Single-Acting spring return cylinders. Uses 1 pressure line.

4/3

4-WAY / 3-POSITION VALVE (Advance / Hold / Retract)Required for Double-Acting cylinders. Powers both extension port (A) and retraction port (B).

CATALOG PAGE 26 SPECIFICATION MATRIX

Hand Pump Selection Chart: Required Handle Strokes to Lift 25 mm

Recommended Optional Not Recommended

Model Number	Stage	Flow (cm³)	5T	10T	15T	25T	30T	50T	75T	100T	150T	200T	250T	300T
HPM-S-280 (P-142)	2-Stage	7.8 / 0.8	19	42	58	-	-	-	-	-	-	-	-	-
HPM-S-900A (P-392)	2-Stage	33.0 / 3.3	6	12	16	26	-	-	-	-	-	-	-	-
HPM-S-2300A (P-802)	2-Stage	33.0 / 3.3	6	12	16	26	31	55	81	-	-	-	-	-
HPM-S-4500 (Large Steel)	2-Stage	26.0 / 2.9	6	13	18	29	38	69	90	114	174	229	-	-
HPM-S-7500 (Heavy Duty)	2-Stage	125.0 / 5.8	3	7	9	15	19	35	45	58	88	116	158	192

* Values indicate number of handle pumping strokes required to lift cylinder by 25 mm under full 700 Bar load.Explore HPM-S Hand Pump Series →

SECTION 03//BOLTING & TORQUE WRENCH SYSTEMS

How to Choose the Right Hydraulic Wrench System

Derived from Catalog Page 4. Torque accuracy and clearance compatibility depend heavily on choosing between square drive sockets versus direct-fit low profile hollow hex links.

UNCONSTRAINED CLEARANCE112 - 72,000 N·m

HSW Series Square Drive Wrenches

Best choice when there is ample overhead space and standard stud protrusion. Uses standard heavy-duty impact sockets (3/4" to 2-1/2" square drive) to tackle multiple bolt sizes with a single power head.

✓Swiveling 360° × 180° uni-swivel manifold
✓High torque-to-weight ratio aircraft alloy body
✓Push-button drive release for fast tightening/loosening switch

View HSW Torque Range & Dimensions →

NARROW PIPELINE CLEARANCE228 - 44,593 N·m

HHW Series Low Profile Hollow Wrenches

Essential for narrow pipe flanges, wellhead valves, and crane slewing rings where protruding studs prevent socket engagement. Slips directly over nut hex (19 mm to 175 mm).

✓Interchangeable cassette ratchet links
✓Ultra-slim head radius down to R=27 mm
✓Direct pass-through over infinite thread extension

View HHW Cassette Sizing →

CATALOG PAGE 40 SELECTION MATRIX

HHW Interchangeable Hex Link Sizing Summary

Metric 19 mm - 175 mm

HHW-2228 - 2,414 N·m19 - 60 mm Hex

HHW-4586 - 6,474 N·m34 - 80 mm Hex

HHW-81,094 - 11,774 N·m41 - 105 mm Hex

HHW-141,826 - 18,286 N·m50 - 117 mm Hex

HHW-182,695 - 26,958 N·m65 - 130 mm Hex

HHW-304,231 - 44,593 N·m110 - 175 mm Hex

SECTION 04//BOLT TENSIONING & FLANGE MAINTENANCE

Bolt Tensioners & Flange Tool Selection Criteria

Derived from Catalog Page 3 & Page 88. Tensioning removes frictional uncertainties by applying pure axial elongation to studs up to 1500 Bar. Flange maintenance tools resolve gap spreading and rotational misalignments safely.

1500 BAR UHPM20 - M150+

Bolt Tensioners (HST-S vs HST-M)

Requires checking radial clearance between stud centers and nut casing.

HST-S (Topside Single-Stage):Standard footprint, highest elongation stroke.

HST-M (Multi-Stage Compact):Stacked hydraulic cylinders fit tight bolt circles (wind turbines & nuclear).

View Tensioner Specs →

LINEAR & ROTATIONAL1 - 10 Ton

Flange Alignment Tools (HFA)

Corrects both parallel offset and rotational twist by locking directly into opposing bolt holes.

HFA-1TM & 4TM (Mechanical):Hand-crank & screw driven for 16-24 mm bolt holes.

HFA-9TM & 9TE (Hydraulic):10 Ton alignment force for 31.5 mm holes and 93-228 mm thick flanges.

View HFA Alignment Specs →

PARALLEL SPREAD8 - 24 Ton

Flange Spreaders (HFS-W & HFS-I)

Essential for gasket replacement and valve removal without hammering wedges or bending pipes.

6 mm First Step Clearance:Ultra-narrow wedge tip enters smallest closed flange seams.

True Parallel Motion:Stepped interlocking jaws eliminate flange face slippage.

View Flange Spreader Specs →

FACTORY APPLICATION ENGINEERING SUPPORT

Need Custom Sizing or System CAD Verification?

Our application engineers calculate custom hydraulic circuits, synchronized multi-point lifting manifolds, and offshore bolt-tightening procedures. Send us your pipeline specs, flange rating, or load weights for verified engineering sizing.

Consult Application Engineer →Check OEM Cross-Reference Matrix