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Used for proportional control of hot or chilled water and glycol solutions (to 50 percent concentration) and for two-position control of low pressure steam in closed loop HVAC systems.


  • Sizes range from 2-1/2 to 6 inches.
  • Stainless steel stem with serviceable Teflon packing.
  • Valves utilize direct mounting valve actuators, Q5020/Q5022 linkages with Direct Coupled Actuators, or Pneumatic Valve Actuators to operate the valve.
  • Equal Percentage flow characteristic.

Product Specifications

Dimensions (in.)
18 3/8 in. high x 10 in. wide x 15 in. deep
Dimensions (mm)
466 mm high x 253 mm wide x 380 mm deep
Maximum Safe Operating Pressure (psi)
150 psi at 240 F water; 15 psi steam
Maximum Safe Operating Pressure (kPa)
1034 kPa at 115 C water; 100 kPa steam
Used With
ML6421B; ML7421B; Q5001/Modutrol IV Motor; MP953
Ambient Temperature Range (F)
40 F to 250 F
Ambient Temperature Range (C)
4 C to 121 C
Connection Type
Body Pattern
Pipe Size (inch)
5 in.
Pipe Size (DN)
Bonnet Size (in.)
1-7/8 in.
Maximum Differential Pressure Ratings (Close-off) (psi)
For Quiet Water Service--20 psid
Maximum Differential Pressure Ratings (Close-off) (kPa)
For Quiet Water Service--138 kPa
Capacity (Cv)
250 Cv
Capacity (Kv)
214 kvs
Valve Action
Stem down to close
Valve Type
Globe Valve
Controlled Fluid
Chilled or hot water with up to 50% Glycol or Low pressure steam. Not for use with fuels.
Materials (Body)
Cast Iron
Materials (Seat)
Materials (Stem)
316 Stainless Steel
Flow Characteristic
Equal Percentage
Must be purchased separately
Static Pressure Rating (psi)
Meets ANSI 125 Standard
Static Pressure Rating (kPa)
Meets ANSI 125 Standard
Stem Travel (in.)
1 1/2 in.
Stem Travel (mm)
38 mm
Bonnet Size (mm)
47.6 mm
Materials (Packing)
Teflon Cone
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