Page 1339 - Softbound_Edition_19_en

Non-return valve
Check valve

Non-return valve hydraulically pilot operated
M22 x 1,5
Screw-in cartridge construction ISO 7789
◆ Q = 80 l/min
max
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Hydraulically pilot operated non-return valve in screw-in cartridge Pilot operated non-return valves are used for closing off pressuri-
construction for cavity according to ISO 7789. In the free flow sed hydraulic cylinders leak free, for example in lifting or clamping
direction (2 → 1), the volume flow opens the spring loaded seat devices. The spool valve that directs the volume flow to port x,
cone. In the opposite direction (1 → 2), the spring keeps the valve should have both service ports connected to the tank in the rest

closed. If pressure is built up in connection x, the pilot control spool position for reasons of operational safety.
is shifted and the non-return valve of the closed off port is opened
by this. The required pilot control pressure depends on the pilot
ratio.

SYMBOL INSTALLATION NOTES
Mounting type Screw-in cartridge M22 x 1,5
1 Mounting position Any
Tightening torque M = 60 Nm Screw-in cartridge
D

2 x (3)

TYPE CODE
RNX PM22 - - #
Non-return valve hydraulically pilot operated

Screw-in cartridge M22 x 1,5
Opening pressure p a 2 bar 2
5 bar 5

Sealing material NBR
FKM (Viton) D1
NBR 872 Z604

Design index (subject to change)
2.7-61

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Designation Non-return valve hydraulically pilot Working pressure p = 350 bar
max
operated Opening pressure p = 2; 5 bar
a
Mounting Screw-in cartridge construction Maximum volume flow Q = 80 l/min
max
Nominal size M22 x 1,5 according to ISO 7789 Leakage oil Seat tight, max. 0,15 ml / min (approx. 3
Actuation None drops / min) at 30 cSt
Ambient temperature -25…+90 °C Fluid Mineral oil, other fluid on request
2
Weight 0,15 kg Viscosity range 12 mm /s…320 mm /s
2
Temperature range -25…+90 °C (NBR)
fluid -20…+90 °C (FKM)
Contamination Class 20 / 18 / 14
efficiency
Filtration Required filtration grade ß 10…16 ≥ 75,
see data sheet 1.0-50
Pilot ratio See characteristic
Area ratio i = 1 : 3

www.wandfluh.com Illustrations are not binding Data subject to change 1/2 Edition: 18 44 2.7-61 E
Page 1339