In-line pilot retention valve

In-line pilot retention valve

The controllable check valve allows free flow of oil in one direction, while in the opposite direction the passage is prevented until the valve is opened by sending pressure to the pilot port.

Normally used for prolonged pressure maintenance in actuators or other types of circuits, it can also be used as an auxiliary exhaust valve when the return flow rate is greater than the capacity of the distributor.

General and hydraulic characteristics

  • Valve construction: seat with hermetically sealed conical shutter
  • Mounting type: in line on the piping
  • Mounting position: indifferent
  • Maximum capacity: see table
  • Permissible fluid:  Mineral oil according to DIN 51524-51525
  • Continuous operating temperature: -20°C – +85°C
  • Fluid temperature: -15°C – +80°C
  • Fluid temperature range:  see graph
  • Surface protection:  from 2.5 a 400cSt (from 1 a 50°E)
  • ecommended nominal viscosity: 35 cSt (4.5°E) a 50°C

 

Bocche E-U [B.S.P.]
Bocca P [B.S.P.]
Passage section [mm²]
Max pressure on mouth E-U-P [bar]
Opening pressure E → U [bar]
Nominal rate [l/min]
Maximum capacity [l/min]
Opening report [K]
Residual pressure admitted on the pilotage [bar]
Pilot cylinder [cm³]
Weight [kg]

DCP-8F: 3/8”
DCP-11F : 1/2”
DCP-16F: 3/4”

DCP-8F: 1/4”
DCP-11F : 1/4”
DCP-16F: 1/4”

DCP-8F: 45
DCP-11F : 70
DCP-16F: 160

DCP-8F: 420
DCP-11F : 315
DCP-16F: 315

DCP-8F: 4
DCP-11F : 4
DCP-16F: 4

DCP-8F: 20
DCP-11F : 35
DCP-16F: 70

DCP-8F: 30
DCP-11F : 50
DCP-16F: 100

DCP-8F: 2.7
DCP-11F : 2.6
DCP-16F: 2.6

DCP-8F: 1
DCP-11F : 1
DCP-16F: 1

DCP-8F: 0.7
DCP-11F : 1
DCP-16F: 2.5

DCP-8F: 0.6
DCP-11F : 1
DCP-16F: 2

For the good functioning of the valve it is advised not to pressure the mouth E during the reverse flow in the driving phase; any chokes or flow regulators must be installed on the U-mouth.

Otherwise, or in applications where pressure multiplication occurs on the mouth U or in any case in general, release is only possible when the relationship is verified:

PP = [PE + 2 + (PU-PE)] : K