Well Service Air Valves

Well Service Air Valves are a member of the Air/Vacuum family and are used with vertical pumps. Well Service Valves are specifically designed to vent the air from the pump column during pump start-up in a controlled manner before the check valve opens to reduce pressure surges that result from the accelerating water column.

Product Overview

  • Available in sizes 1/2"-3" equipped with Dual Port Throttling Device
  • 4" and larger equipped with Regulated-Exhaust Device mounted on the inlet
  • Regulates the exhaust of air on pump start-up
  • Admits air to protect pump and mechanical seals
  • Protects against air-related surges on pump start-up
  • Manufactured under a certified ISO 9001 quality system
  • Automated Sizing Program

Certifications

Features

  • Unconditionally guaranteed 316 stainless steel floats
  • Inlets and outlets are equal to full nominal pipe area
  • Dual Port Throttling Device
    • Adjustable discharge outlet provides regulated air exhaust
    • Allows air to enter the system on pump shut down through an unrestricted independent vacuum port
  • Regulated-Exhaust Device
    • Restrictor disc provides regulated exhaust to limit pump column surges
    • Ability to adjust air exhaust for greater surge suppression
    • Provides full vacuum flow port

Specifications

Valve Size Product Description Drawing Number
1/2" - 12" Well Service Air Valves VM-100ST-S
2" - 3" Fire Protection Well Service Air Valves VM-102ST-S

Materials of Construction

Valve Size Product Description Drawing Number
1/2" - 3" 100S Air/Vacuum Valve VM-100S-M
1/2" - 3" 100WS Well Service Air Valve VM-100WS-M
1/2" - 3" Dual Port Throttling Device VM-5DPT-M
4" - 12" 1200S Regulated Exhaust Device (RED) VM-1200S-M

Dimensions

Valve Size Product Description Drawing Number CAD Version
1/2" - 3" 100ST Well Service Air Valve - with Dual Port Throttling Device VM-100ST  
1/2" - 3" 100WS Well Service Air Valve VM-100WS  
1/2" - 3" Dual Port Throttling Device VMC-5DPT CAD-5DPT
4" - 12" 104SS Surge-Suppression Air Valve VM-104SS  

Manuals

Valve Size Product Description Drawing Number
1/2" - 3" Well Service Air Valve WSAV-OM1
4" - 20" Well Service Air Valve SSAVV-OM1

Technical Data

Product Description Drawing Number CAD Version
Air Valves for Vertical Pump Applications White Paper  
Well Service Air Valve Sizing SS-1018  
Application Chart Chart  
Air Valves for Fire Protection Service White Paper  
Well Service Air Valve Installation - 1/2" - 3" PDF CAD
Well Service Air Valve Installation - 4" - 20" PDF CAD
Well Service Air Valve Installation PDF CAD

Brochures