The integrated counterbalance valve allows fast-forward movement of a cylinder by directing the full inlet flow to pass directly through the booster section until the set pressure has been reached. Then the counterbalance valve opens, and the booster starts oscillating. The integrated pressure reducing valve controls inlet pressure to the booster section, protecting both booster and high-pressure tool against too high pressure. An optional orifice can be mounted in the R-port to prevent overspeeding.

Technical Data

• PIN: 20-207 bar
• PH: 800 bar maximum
• PRETURN: As low as possible
• POUTLET = (PIN - PRETURN) x intensification factor
• Mounting: Inline tube
• Weight: 3.0 / 3.3 kg

Model Versions

A model = no dump valve. B model = with dump valve. Material certificate 3.1 on request.

Oil is fed through the directional valve (in the customer system) to the IN port, flowing freely through the PRV (pos. 5) and the internal check valves to the high-pressure side H, achieving maximum flow for a fast-forward function. When pump pressure is reached on H, internal check valves close and end pressure is achieved by the oscillating pump unit OP, which automatically stalls. The OP valve automatically operates to maintain end pressure on any drop.

Ordering example: HC225 - 4.0 - B - 1 (i=4.0, DV incorporated, BSPP connections). Attention: Valve pre-settings are required, please specify when ordering.