PC08-30 Check, Pilot-to-Open (PC08-30)

A screw-in, cartridge-style, pilot-operated, hydraulic check valve for use in blocking or load-holding circuits.

Product Operation

The PC08-30 allows flow from 2 to 3, while normally blocking flow from 3 to 2. Flow will be allowed from 3 to 2 when sufficient pressure is applied at 1.
The cartridge has a 3:1 pilot ratio, meaning that at least one-third of the load pressure held at 3 is required at 1 to open the valve.
The check is spring-biased to assure holding in static or no-load conditions. A sealed pilot piston option is available.

Product Features

• Hardened seat for long life and low leakage.• Optional sealed piston.• Optional spring ranges.• Compact size.

Product Ratings

Operating Pressure: 240 bar (3500 psi)
Flow: See Performance Chart
Maximum Internal Leakage at 207 bar (3000 psi): 3 to 2: 0.10 ml/minute (2 drops/minute) 2 to 1 without sealed piston: 115 ml/minute (7 cu. in./minute) 2 to 1 with sealed piston: zero leakage
Pilot Ratio: 3:1
Check Spring Bias: 1.72 bar (25 psi) standard; With sealed piston option: 6.2 bar (90 psi) minimum
Temperature: -40 to 100°C (-40 to 212°F) with standard Buna seals;-26 to 204°C (-15 to 400°F) with fluorocarbon seals;-54 to 107°C (-65 to 225°F) with polyurethane and urethane seals.
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC08-3; See page 9.108.1
Cavity Tool: CT08-3XX; See page 8.600.1
Seal Kit: SK08-3X-TM; See page 8.650.1

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