![]() |
These are a family of air operated valves actuated by a piston. The material of construction is primarily stainless steel ASTM-CF8 investment casting, AISI-304 drawn materials, and bronze. The piston is aluminium alloy and the spring material is powder coated spring steel. All 3-way piston valves have soft seats with carbon filled PTFE enabling bubble tight sealing.
The mounting for all valves are threaded ports with the option of flange mounts. We also manufacture 3-way normally open valves. These valves are available with threaded mounting or with optional flange mounting.
Custom designs are possible. All dimensions and drawings can change at any time without any notice. Information is for reference only. Please contact us for details before ordering or purchasing.
Screw Type
![]() |
Screw type 3-way piston valve |
![]() |
Specifications |
|
![]() | Sizes (normally closed) 1/4", 1/2", 3/4", 1", 1-1/4" and 1-1/2" |
![]() | Control air pressure 35 - 50 psi (2.4 - 3.5 bar) |
![]() | Maximum pressure 460 psi (32 bar) |
![]() | Maximum fluid temperature 205 degrees C |
Model No. | Size inches |
L mm |
H1 mm |
H2 mm |
D mm |
Weight kg |
Flow Cv |
V-S306-GA | 1/4" | 85 | 50 | 164 | 81 | 2.5 | - |
V-S315-GA | 1/2" | 85 | 50 | 164 | 81 | 2.5 | 3.9 |
V-S320-GA | 3/4" | 110 | 61 | 190 | 99 | 3.9 | 5.7 |
V-S325-GA | 1" | 120 | 70 | 230 | 124 | 6.3 | 9.7 |
V-S332-GA | 1-1/4" | 145 | 76 | 252 | 140 | 9.0 | 18.8 |
V-S338-GA | 1-1/2" | 160 | 85 | 293 | 166 | 13.8 | 26.6 |
Large Type
![]() |
Large type 3-way piston valve |
![]() |
Specifications |
|
![]() | Sizes (normally closed) 2" and 2-1/2" |
![]() | Control air pressure 35 - 50 psi (2.4 - 3.5 bar) |
![]() | Maximum pressure 300 psi (21 bar) |
![]() | Maximum fluid temperature 205 degrees C |
Model No. | Size inches |
L mm |
H1 mm |
H2 mm |
Flow Cv |
Weight kg |
V-S350-GA | 2" | 180 | 94 | 324 | 34.6 | 20.5 |
V-S365-GA | 2-1/2" | 220 | 114 | 370 | 54.0 | 32.2 |
Normally Open Type
![]() |
Normally open 3-way piston valve |
![]() |
Specifications |
|
![]() | Sizes (normally open) 1/2", 3/4", 1", 1-1/4", 1-1/2" and 2" |
![]() | Control air pressure 35 - 50 psi (2.4 - 3.5 bar) |
![]() | Maximum pressure 460 psi (32 bar), 2"- 300 psi (21 bar) |
![]() | Maximum fluid temperature 205 degrees C |
Model No. | Size inches |
L mm |
H1 mm |
H2 mm |
D mm |
Weight kg |
VNO-S315-GA | 1/2" | 85 | 50 | 191 | 81 | 2.8 |
VNO-S320-GA | 3/4" | 110 | 59 | 210 | 99 | 4.4 |
VNO-S325-GA | 1" | 120 | 70 | 290 | 124 | 7.2 |
VNO-S332-GA | 1-1/4" | 145 | 76 | 323 | 140 | 10.3 |
VNO-S338-GA | 1-1/2" | 160 | 91 | 383 | 166 | 16.2 |
VNO-S350-GA | 2" | 180 | 94 | 417 | 197 | 22.6 |
Flange Type
![]() |
![]() |
Specifications |
|
![]() | Sizes (normally closed) 1/4", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" and 2-1/2" |
![]() | Control air pressure 35 - 50 psi (2.4 - 3.5 bar) |
![]() | Maximum pressure 460 psi (32 bar) , 2", 2-1/2"- 300 psi (21 bar) |
![]() | Maximum fluid temperature 205 degrees C |
Size | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" |
OL-Standard (JIS) | 146 | 146 | 167 | 190 | 190 | 216 | 241 |
OL-ANSI | 140 | 150 | 170 | 190 | 200 | 230 | 241 |
OL-DIN | 130 | 150 | 160 | 180 | 200 | 230 | 241 |
Click here to view flange details.
Replace 3xx by 2xx for 2-Way Valves, with Port 3 plugged. Flange: Standard-JIS, Optional: ANSI, DIN |