Types 4160 and 4165
Slide valves



Slide valves Type 4160 (normally closed) and 4165 (normally open) are manifold mounted, pilot-operated, three port, two position valves with a spring-return action. A major feature of the valve design is elimination of the continuous internal leakage which is characteristic of conventional lapped-face spool valves. The valves each incorporate special high pressure seals which prevent leakage and so render the valves suitable for use with many fluid media.

The valve slide (which can be supplied either normally closed or normally open) has a ‘block before bleed’ action.		 In a normally closed valve, for example, this means that the tank port is isolated before pressure and service ports are interconnected.

Construction materials

Predominantly 316 stainess steel and CA104 aluminium bronze with seals of fluoroelastomers and PTFE materials, ensure high corrosion resistance and comply with NACE Standard MR-01-75 (latest revision as applicable).

These slide valves conform to Directive 94/9/EC relating to equipment intended for use in potentially explosive atmospheres and is ATEX (ATmosphere EXplosible) certified.
Marshalsea Hydraulics has been assessed by SGS Société Générale de Surveillance SA and certified as meeting the requirements of ISO 9001:2000 for the design, development, manufacture and servicing of hydraulic pumps, relief valves and intensifiers.

Operating parameters
Working pressure 690 bar (10,000 psi) max.
Pilot pressure 3.4 to 17.2 bar (50 to 250 psi).
Operating media – main slide Mineral oils, water, water-glycol mixtures.
Operating media – pilot section Air or any of the main slide media above.
Recommended filtration 25 micron.
Connections 3/8" NPTF.
Connections – pilot 1/4" NPTF.
Flow rate, nominal 54 litres/min (12 imp galls/min).
Working temperature –20°C to + 130°C.