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Siemens VRD Series Technical Instructions

Double valves for use with skp electro-hydraulic actuators
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VRD Series
VRD40.xxxUx Double Valves
for use with SKP... electro-hydraulic actuators
ISO 9001 and 14001
REGISTERED FIRM
Description
Only with series SKPxx.xxxUx actuators
The normally closed VRDxx.xxxUx series of modular double-body gas valves combine
with SKP... series electro-hydraulic actuators to provide safety shut-off, gas pressure
regulation and/or air-gas ratio control for commercial or industrial gas burners.
Table 1. VRDxx.xxxU model numbers
Model Numbers
VRD40.040U
VRD40.050U
VRD40.065UF
VRD40.080UF
VRD40.100UF
VRD40.150UF
Technical Instructions
Body style
Double
Double
Double
Double
Double
Double
Document No. 7649
VRD40.xxxUx
September 08, 2016
Connection
NPT thread
NPT thread
ANSI flange
ANSI flange
ANSI flange
ANSI flange
Siemens AG Building Technologies Division

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  Summary of Contents for Siemens VRD Series

  • Page 1 Table 1. VRDxx.xxxU model numbers Model Numbers Body style Connection VRD40.040U Double NPT thread VRD40.050U Double NPT thread VRD40.065UF Double ANSI flange VRD40.080UF Double ANSI flange VRD40.100UF Double ANSI flange VRD40.150UF Double ANSI flange Siemens AG Building Technologies Division...
  • Page 2 For details on valve sizing see the flow charts (figures CAUTION: Do not oversize valves equipped with a regulating SKP2... / SKP5... / SKP7… actuator. Oversizing may limit turndown and could cause oscillations. Page 2 Siemens AG Building Technologies Division...
  • Page 3: Ordering Information

    Sealing gasket to provide NEMA 3, NEMA 3R, and NEMA 4 protection. Gasket kit to SKP... - Place between actuator SKP… and valve VRD40.xxxUx - Increases degree of protection from IP54 to IP65 - Refer to Mounting Instruction M7643.2 (74 319 0421 0) Siemens AG Building Technologies Division Page 3...
  • Page 4: Specifications

    Condensation in the valve is not permitted. The user must decide after consultation with Siemens whether the valve materials are suited for the relevant type of gas. The composition and concentration of the gas components may vary.
  • Page 5 Body materials See Table 2 characteristics Weight See Table 6 All valve parts Nonferrous Connections Pipe connections NPT threads or ANSI class 150 flanges (see Table 2) Pressure and vent taps See Dimensions Siemens AG Building Technologies Division Page 5...
  • Page 6: Operation

    See Table 2 and 3 for details on ports and vent connection plates. 7649z02/0514 Figure 1. Sectional view of VRD40.065UF Closing springs: Each double seat uses one pair of springs. The spring forces act separately as closing forces on the individual valve seats. Page 6 Siemens AG Building Technologies Division...
  • Page 7 Pressure drop is total drop across both valves when using SKPx5… actuator, with or without an AGA66. CAUTION: Do not oversize valves equipped with regulating actuators SKP2…, SKP5… or SKP7… Oversizing may limit turndown and could cause oscillations. Siemens AG Building Technologies Division Page 7...
  • Page 8 VRD4 Series Double Valves Document Number CC1N7649us September 08, 2016 Dimensions Dimensions in Inches (mm) (Shipment conditions: Mounted base plates on both sides) VRD40.040U / VRD40.050U 1/4" 1/4" 1/4" 7649m04us/1215 a) Base plate Page 8 Siemens AG Building Technologies Division...
  • Page 9 5.71 7.40 2.09 2.30 6.61 10.31 0.63 0.91 3.54 5.61 0.90 10.63 (480) (337.5) (145) (188) (53) (58.5) (168) (262) (16) (241) (23) (90) (142.5) (22.9) (270) * SW = width across flats Siemens AG Building Technologies Division Page 9...
  • Page 10 5.49 3.17 0.79 (185) (105) (139.5) (80.5) (20) (9.6) VRD40.100UF 8.54 4.76 6.26 3.94 1.95 (210) (121) (159) (100) (49.5) (13) VRD40.150UF 11.30 6.14 7.80 5.47 2.28 (287) (156) (198) (139) (58) (24) Page 10 Siemens AG Building Technologies Division...
  • Page 11 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners. Siemens AG Building Technologies Division Your feedback is important to us. If you have Document No.