• Generates and automatically controls the set pressure up to a maximum of 3500 kPa (500 p.s.i.) within ± 0.5%
• Very stable over long periods
• Required pressure set using precision hand wheel control
• Stepless pressure increments
• No weights nor calibration required

This apparatus provides an infinitely variable constant pressure using an adjustable spring type dead weight pressure feedback system connected in-line with a pump and an oil/water interchange vessel.

The apparatus comprises: hydraulic pump, honed piston/spring assembly, cylindrical oil/water interchange vessel, pressure gauge, valves, 2 kg of oil.
Two versions available:

• For pressures up to 3500 kPa (28-WF4312 and 28-WF4314 models)