DWHG series are solenoid pilot operated spool type valves . This series are used to control the start ,stop and direction of flow.
| Size | 10 | 16 | 22 | 25 | 32 |
| Max operating pressure P.A.B(MPa) | 31.5 | 35 | 31.5 | 35 | 35 |
| Externally drained T Port (MPa) | 31.5 | 25 | 25 | 25 | 25 |
| Internally drained T Port (MPa) | (AC)-10 | (AC)-10 | (AC)-10 | (AC)-10 | (AC)-10 |
| (DC)-16 | (DC)-16 | (DC)-16 | (DC)-16 | (DC)-16 | |
| Externally drained Y Port (MPa) | (AC)-10 | (AC)-10 | (AC)-10 | (AC)-10 | (AC)-10 |
| (DC)-16 | (DC)-16 | (DC)-16 | (DC)-16 | (DC)-16 | |
| Min. Pilot pressure(MPa) | 0.45-1 | 0.45-1.3 | 0.45-1 | 0.45-1 | 0.45-1 |
| Max. flow rate(L/min) | 160 | 300 | 450 | 650 | 1100 |
| Weight(KGS) | 6.7 | 9.5 | 12 | 18 | 38.5 |
| Valve body（Material）Surface treatment | casting phosphating surface | ||||
| Oil cleanliness | NAS1638 class 9 and ISO4406 class 20/18/15 | ||||
Characteristic curves：Type 4DWHG10…（measured with HLP46，Voil=40℃±5℃）
Characteristic curves：Type 4DWHG16…（measured with HLP46，Voil=40℃±5℃）
Characteristic curves：Type 4DWHG22…（measured with HLP46，Voil=40℃±5℃）
Characteristic curves：Type 4DWHG25…（measured with HLP46，Voil=40℃±5℃）
Characteristic curves：Type 4DWHG32…（measured with HLP46，Voil=40℃±5℃）
Spool symbols
Pilot fluid supply
1、4DWHG10
(1) Internal pilot and external pilot:The“P”port with M6 screw 3 is external pilot,to convert valve into internal pilot, the M6 screw 3 must be removed.
(2) Internal drain and external drain:Removing the bolt 1, to install M6 screw 2 is external drain,unscrew the M6 screew 2 is internal drain.
2、4DWHG16
(1) Internal pilot and external pilot: Removing the sideward cover, installing the pin to allow “P” port with open position is internal pilot, to convert the pin into “P” port with plugged position is external drain.
(2) Internal drain and external drain:Removing the bolt 1 and installing M6 screw 2 is external drain, unscrew the M6 screw 2 is internal drain.
Pilot fluid supply
3、4DWHG25
(1) Internal pilot and external pilot:Removing the sideward cover,installing M6 screw 1 is external pilot,unscrew the M6 screw 2 is internal pilot.
(2) Internal drain and external drain: Removing the M6 screw 2 in the “T”port on the top of main valve is internal drain, installing the M6 screw 2 is external drain.
4、4DWHG32
1、Internal pilot and external pilot:Installing the M6 screw 1 in the“P”port on the top of main valve is external pilot；removing the M6 screw 1 is internal pilot.
2、Internal drain and external drain:Removing the M6 screw 2 in the“T”port on the top of main valve is external drain；installing the M6 screw 2 is internal drain.
NOTE : 1.The “X” port on the base plate must be plugged if internal pilot.
2.The “Y” port on the base plate must be plugged if internal drain.
4DWHG10 Subplate Installation Dimensions
4DWHG16 Subplate Installation Dimensions
Valve’s set screw
4 of M10×60 GB/T70.1-12.9 Tightening torque Ma=75Nm.
2 of M6×60 GB/T70.1-12.9 Tightening torque Ma=15.5Nm.
O-ring for P.T.A.B Port: φ26×2.4
O-ring for X.Y.L Port: φ15×1.9
4DWHG22 Subplate Installation Dimensions
Valve’s set screw
6 of M12×60 GB/T70.1-12.9 Tightening torque Ma=130Nm.
O-ring for P.T.A.B Port: φ31×3.1
O-ring for X.Y Port: φ25×3.1
4DWHG25 Subplate Installation Dimensions
Valve’s set screw
6 of M12×60 GB/T70.1-12.9 Tightening torque Ma=130Nm.
O-ring for P.T.A.B Port: φ34×3.1
O-ring for X.Y Port: φ25×3.1
4DWHG32 Subplate Installation Dimensions
Valve’s set screw
6 of M20×80 GB/T70.1-2000 12.9 Tightening torque Ma=430Nm.
O-ring for P.T.A.B Port: φ42×3
O-ring for X.Y Port: φ19×3
Installation dimensions
