HC7H versions: 5 different intensification factors

PIN: 20 – 207 bar

PH: 2,600 bar maximum

PRETURN: As low as possible (return pressure to tank)

POUTLET: PH = (PIN – PRETURN) x intensification factor

Mounting: Inline tube

Weight: 1.5 kg.

Model versions:

A model = no dump valve
B model = with dump valve
G model = direct proportionally controlled

Material certificate 3.1 on request


The HC7H is a very compact high-pressure unit capable of delivering pressure up to 2,600 bar weighing only 1.5 kg. It is ideal for use in portable applications like on power packs.

The HC7H raises supplied pressure to a higher outlet pressure and automatically compensates for consumption of oil to maintain the high pressure. Adjustment of the outlet pressure is carried out by varying the supplied pressure. With the choice of different high- pressure adapters, a variety of threads can be obtained from the M22x1.5 thread in the HP port. 

Flow rates

Intensification factor
Max. intensified outlet flow
Max. inlet flow


The basic operation is illustrated in the function diagram. Oil is fed through the directional valve CV to the IN port, flowing freely through the check valves KV1, KV2 and DV to the high-pressure side H. In this condition maximum flow through the booster is achieved, giving a fast-forward function.

When pump pressure is reached on the high-pressure side H, valves KV1, KV2 and DV will close. The end pressure will be achieved by the oscillating pump unit OP. The unit will automatically stall when end pressure on the high-pressure side H is reached. If a pressure drop on the high-pressure side exists due to consumption or leakage, the OP valve will automatically operate to maintain the end pressure.

Function diagram



Dimension drawing 7H-120-02

Connection types

ConnectionIN / RH
11/4" BSPPM22 x 1.5
27/16-20" UNFM22 x 1.5

High-pressure adapters

High-pressure adapter ordering codes and specifications are shown in the PDF-file: 7-900-10

Fluids and materials

Additional information is available on the website under Products → General specifications.

Ordering an HC7H

Ordering example of an HC7H with i = 13.0, H1 M22 x 1.5 and H2 9/16-18 UNF, DV incorporated and BSPP connections: HC7H – 13.0 – B – 12

Attention notes!
High-pressure adapter is required, please specify ordering code – see high-pressure adapter table.
High-pressure adapters will be factory mounted.

The G-model is available in 2 variants, when ordering please specify accordingly:

  • Dynamic – low hysteresis: Ordering example of an HC7H with i = 13.0 RV incorporated, H1 M22 x 1.5 and H2 9/16-18 UNF and BSPP connections: HC7H – 13.0 – G – 12
  • Fail safe – high hysteresis: The RV valve opening ratio is to be determined on individual basis. Contact our technical support. Ordering example of an HC7H with i = 13.0 RV with opening ratio x.x incorporated, H1 M22 x 1.5 and H2 9/16-18 UNF and BSPP connections: HC7H – 13.0 – G – x.x – 12


  • HC7H

Intensification, i

  • Select factor
  • See flow rate table

Model version

  • Select type
  • A = without DV
  • B = with DV
  • G = with proportional valve


  • Select thread
  • See table below

  Ordering codeIN / RH1H2H3H4
  HC7H-___-__-111/4" BSPPM22 x 1.5---
  HC7H-___-__-217/16-20 UNFM22 x 1.5---
  HC7H-___-__-121/4" BSPPM22 x 1.59/16-18 UNF--
  HC7H-___-__-227/16-20 UNFM22 x 1.59/16-18 UNF--
  HC7H-___-__-131/4" BSPPM22 x 1.59/16-18 UNF9/16-18 UNF-
  HC7H-___-__-237/16-20 UNFM22 x 1.59/16-18 UNF9/16-18 UNF-
  HC7H-___-__-141/4" BSPPM22 x 1.59/16-18 UNF9/16-18 UNF9/16-18 UNF
  HC7H-___-__-247/16-20 UNFM22 x 1.59/16-18 UNF9/16-18 UNF9/16-18 UNF

Max. tightening torque BSPP

IN / R
1/4" BSPP
with steel washer4.0 da/Nm
with cutting edge4.0 da/Nm

Max. tightening torque UNF

IN / R
7/16-20" UNF
with o-ring2.0 da/Nm