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.

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).

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"NPT F 1/4"NPT F pilot port
Flow rate, nominal	54 litres/min (12 imp galls/min)
Working temperature	–20°C to + 130°C

Port assignments

Port	Valve 4160	Valve 4165