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Three-way Mixing, Unitary, O.D. 1/2 in.


Three-way mixing, unitary water valve with 1/2 in. O.D. and 1.5/1.5 Cv capacity

  • Product Info
  • Literature
  • Accessories & Replacement Parts


Three-pipe, sequencing, pneumatically operated water valve for controlling both hot and cold water flow in fan-coil and induction units. Replacement devices are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell devices.


  • Corrosion resistant.
  • Molded-in composition discs for tight shutoff.
  • Flare connections for easy installation.
  • Operator rotates 360 degrees for convenient air piping alignment.

Product Specifications

Dimensions (in.)
9 7/8 in. high x 5 1/8 in. diameter
Dimensions (mm)
257 mm high x 130 mm diameter
Temperature Range (F)
35 F to 250 F; Maximum Actuator Temperature--160 F
Temperature Range (C)
2 C to 121 C; Maximum Actuator Temperature--71 C
Operating Humidity Range (% RH)
5 to 95% RH
Connection Size (in.)
O.D.: 1/2 in.; Nominal: 3/8 in.
Connection Type
45 deg. SAE flare
Body Pattern
Three-way Mixing
Spring Range (psi)
3 psi to 11.5 psi
Spring Range (kPa)
21 kPa to 79 kPa
Air connections
1/8 in. NPT
Capacity (Cv)
Port A: 1.5 Cv, Port B: 1.5 Cv
Capacity (Kv)
Port A: 1.3 Kv, Port B: 1.3 Kv
Valve Action
Valve Type
Body Pressure (psi)
250 psi
Body Pressure (kPa)
1724 kPa
Maximum Diaphragm Pressure (psi)
25 psi
Maximum Diaphragm Pressure (kPa)
172 kPa
Controlled Fluid
Close-off Ratings at Branch Line Pressure
50 psid at 13 psi

Replacement Parts


Actuator for VP522B1003


Actuator assembly for VP522B1011 andVP522B1029


Rebuild kit with stem and disc holder, button with screw and packing


Rebuild kit W. Stem/Disc holder/button


Rebuild kit W. Stem/Disc holder/button


Rebuild kit with stem and disc holder, button with screw and packing