Overview
The VRW2 two-way dynamic pressure independent control valves maintain constant flow of hot/chilled water in closed-loop heating, ventilating, and air conditioning (HVAC) systems regardless of head pressure fluctuations above minimum pressure drop.
Features
Multi-sized bodies from 21/2 to 6 inch pipes with wafer flanged connections.Combination ANSI/ASME Class 150/300 pressure rating.Controls hot or chilled water with up to 50% glycol.Regulated flow rates available from 39 to 469 gpm.Stainless steel pressure regulator maintains constant pressure drop across valve seat.Positive pressure, rolling diaphragm regulator design provides flow control accuracy of ±5% over specified pressure range.Equal percentage flow characteristic using multi turn, non-rising, characterized plug.High close-off rating.50 discrete, selectable flow rates available per valve size.Stainless steel trim.Six-turn actuator with floating or modulating inputs available with stay-in-place or electronic fail-safe action.Fail-safe actuators field-configurable for normally open or normally closed power failure return position.Two Test Ports for venting or pressure gauge attachment.
- Dimensions (in.) : 12.6 x 10-9/16 in. x 16.7
- Dimensions (mm) : 320 mm x 269 mm x 424 mm
- Maximum Safe Operating Pressure (psi) : 580 psig
- Maximum Safe Operating Pressure (kPa) : 4000 kPa
- Comments : 2 - 10V position feedback signal
- Operating Temperature Range (F) : Maximum Safe Operating--248 F
- Operating Temperature Range (C) : Maximum Safe Operating--120 C
- Ambient Temperature Range (F) : 14 F to 131 F
- Ambient Temperature Range (C) : -10 C to 55 C
- Accuracy : ±5% over specified pressure range
- Maximum flow rate (gpm) : 73 - 222 gpm
- Connection Type : Wafer flange
- Body Pattern : 2-way, straight-through
- Pipe Size (inch) : 3 in. or 4 in.
- Pipe Size (DN) : DN80 or DN100
- Fluid Temperature (C) : -20 C to 120 C
- Fluid Temperature (F) : -4 F to 248 F
- Maximum Differential Pressure Ratings (Close-off) (psi) : 101 psid
- Maximum Differential Pressure Ratings (Close-off) (kPa) : 700 kPa
- Valve Action : Multi-turn linear
- Controlled Fluid : Chilled or hot water with up to 50% Glycol. Not for use with steam or fuels.
- Materials (Body) : Ductile Iron, ASTM A536"“65T, Class 60-45-18
- Materials (Seat) : 316 Stainless steel
- Materials (Stem) : Stainless Steel
- Flow Characteristic : Equal Percentage
- Actuation : Modulating/Floating Fail-safe actuator
- ANSI/ASME Rating : 150/300
- Stem Travel (in.) : 1 to 6 Rotations in 51 equal, field-selectable increments
- Materials (Plug/Ball/Disc) : 316 stainless steel
- Materials (Packing) : EPDM and Nitrile O-rings
- Materials (Diaphragm) : EPDM
- Materials (Regulator) : 316 Stainless steel
- Leakage : 0.2% max.
- Head Loss Range (psi) : 8.6 psid to 58 psid
- Head Loss Range (ft) : 18.7 ft to 126 ft
- Head Loss Range (kPa) : 59 kPa to 400 kPa
- Maximum flow rate (m3/h) : 17 - 50 m3/h
