DH6/10

Slow return check valve – Gasket type
KMK
Overview
This slow return check valve, in which a
check valve is assembled into the variable
throttle valve, can restrict the flow in one
direction and allow the flow in the opposite
direction to pass freely.
Type indication
Features
1. This is of gasket connection type.
2. As a lock nut is installed, there is no
change in the throttle opening by vibration
of the pipe during operation.
3. The number of parts is small and the
structure is simple.
4. As there is no seat part, it is superior in
durability.
Hydraulic symbols
Slow return check valve – Gasket type
Slow return check valve
Nominal dimension
10, 20, 30
Connection method
P = Gasket connection type
Precautions in use
Make adjustments with no pressure applied.
Be careful that if the adjust thread is loosened excessively
by a spanner, etc., the valve may be broken.
Type of hydraulic oil
No symbol
Mineral based hydraulic oil
V Phosphate ester based hydraulic oil
W Fatty ester based hydraulic oil
Water-glycol based hydraulic oil
Series number: 4, 1
Pressure - Flow rate characteristics (viscosity 36 mm 2 /s (cSt))
Specifications
Nominal dimension
Maximum working pressure MPa (kgf/cm 2 )
Maximum flow rate L/min
Cracking pressure MPa (ikgf/cm 2
Mass kg
KMK10 KMK20 KMK30
Pressure difference (MPa)
Opening by
1 1/4 turn from
full closing
Throttle opening
Pressure difference (MPa)
Fully opened
Opening by
1 3/4 turn from
full closing
Throttle opening
Pressure difference (MPa)
Opening by
1 turn from
full closing
Throttle opening
Flow rate (L/min)
Flow rate (L/min)
Flow rate (L/min)
3-16