HPS · Hydraulic Power SystemsHydraulic Power Systems
Quality

Acceptance testing and certificates

Every cylinder is pressure-tested and checked for leakage and function before dispatch.

Certificates

Management systems and material documentation

Certificate copies on request.

ISO 9001:2015

ISO 9001:2015

No: QMS-017697
Quality management
Issued by: IQR International Certification Services
Date: 24.08.2026
Validity: until 23.08.2027
On request
ISO 14001:2015

ISO 14001:2015

No: EMS-017696
Environmental management
Issued by: IQR International Certification Services
Date: 24.08.2026
Validity: until 23.08.2027
On request
ISO 45001:2018

ISO 45001:2018

No: OHSMS-005549
Occupational health and safety management
Issued by: IQR International Certification Services
Date: 24.08.2026
Validity: until 23.08.2027
On request
ISO 10002:2018

ISO 10002:2018

No: YM250331
Customer complaints handling
Issued by: QAR-CERT International Certification Center
Date: 24.08.2026
Validity: until 23.08.2027
On request
EN 10204 3.1

EN 10204 3.1

Material documentation

Inspection certificates for tube and rod.

On request
Trademark registration certificate

Trademark registration certificate

No: 2017 73376
Trade and service mark · Nice classes 07, 12, 35, 37
Turkiye (TÜRKPATENT)

HPSYSTEMS trademark registered with the Turkish Patent and Trademark Office.

Issued by: Turkish Patent and Trademark Office
Date: 24.01.2018
Validity: 10-year protection, renewable
View document
On request

Documents on request

Test record

Pressure, leakage, function

Salt spray test report

Tests before dispatch

Test, method and acceptance

HPS basınç test presi
ISO 10100
  1. 01
    Pressure
    To drawing, otherwise 1.5 × nominal pressure (ISO 10100). Acceptance: no visible permanent deformation.
  2. 02
    Internal leakage
    Checked on the test bench. Acceptance: for double-acting cylinders, where applicable, no internal leakage with the opposite port open.
  3. 03
    External leakage
    Checked for oil at ports, seals or welds. Acceptance: no external leakage at ports, seals or welds.
  4. 04
    Function
    Extended and retracted on the test bench. Acceptance: full stroke at low pressure, with no sticking or irregular movement.
  5. 05
    Dimensions
    Final inspection of lengths, mounting dimensions and port positions. Acceptance: conforms to the approved drawing.
  6. 400 bar
    Test bench
    Our test bench works up to 400 bar as standard, with higher test pressures by agreement. Bench capacity is not a pressure rating for the cylinder.
Standards

ISO 10100 and ISO 4413

Unless the drawing states otherwise, the pressure test follows ISO 10100.

ISO 10100

Hydraulic cylinder acceptance testing

To drawing, otherwise 1.5 × nominal pressure.

At HPS
Every cylinder, before dispatch
ISO 4413

Hydraulic system safety

General rules and safety requirements for hydraulic fluid power systems and their components.

At HPS
Used as a design reference
All standards
Materials

Materials, seals and coatings

Barrel
Honed tube, EN 10305-1 E355, bore tolerance H8 or H9, as agreed
Piston rod
C45E (Ck45) or 42CrMo4
Heads and pistons
C45
Caps and other welded parts
Weldable St52
Hard-chrome plating
Min. 20 µm per side (40 µm on the diameter), typically 30 µm per side
Stage tube plating
On our own line, with approved platers for extra capacity
Seal materials
NBR, HNBR, PU, FKM or PTFE, selected for the application
Hydraulic fluid
Mineral oils HL or HLP to DIN 51524; other fluids on request
Operating temperature
−30 °C to +90 °C with our standard PU and NBR seal compounds; other compounds for special conditions

These specifications apply unless you state otherwise on your drawing or in your enquiry.

HPS manufactures under its registered trademark; all certificates and documents above are issued in the name of our legal entity.