PILOT OPERATED CHECK, PILOT TO OPEN
SPECIAL CAVITY
VU-N-38-P 04.31.26 - X - 99 - Z
Rev.0905 Page. AS4.050
When pressure at 2 rises above the spring bias pressure, the poppet is pushed from
its seat and flow is allowed from 2 to 1. The valve is normally closed (checked) from
1 to 2. When sufficient pilot pressure is present at port 3, the pilot piston acts to push
the poppet from its seat and flow is allowed from 1 to 2. Precision machining and
hardening processes allow virtually leak-free performance in the checked condition.
SPRINGS
Z
Cracking pressure
psi
(bar)
00
15
(1)
01
65
(4.5)
TECHNICAL DATA
Max. pressure: 5000 psi (350 bar)
Max. flow: 8 gpm (30 l/min)
Pilot ratio: 7 : 1
Special cavity : 771 (see page CT.S.004.U)
External seal kit : RG38PS201052010
Installation torque : 56-64 ft-lb (75-87 Nm)
Weight: 0.278 lbs (0.126 Kg)
X
O-RING ON PILOT PISTON
00
No O-Ring
10
With O-Ring
PILOT OPERATED CHECK, PILOT TO OPEN
SPECIAL CAVITY
VU-N-38-P 04.31.26 - X - 99 - Z
