Install Instructions
Schneider Electric 1354 Clifford Ave. Loves Park, IL 61111 1-888-444-1311 www.schneider-electric.com
F-27651-1 June 2011 ao
© 2011 Schneider Electric. All rights reserved.
VB-7000 Series Globe Valves
Venta
2
VB-72X1 Union End NPT Valve Bodies
The VB-7211 and VB-7221 series of union valve bodies conform to Ameri-
can Standard Taper Pipe Threads (NPT).
1. Apply pipe dope sparingly to all but the last two threads of a properly
threaded, reamed, and cleaned pipe. Make sure that pipe chips, scale, etc.
do not get into the pipe since this material may lodge in the valve seat and
prevent proper closing and opening of the valve.
2. Start the joint by hand screwing the pipe into the valve. If the thread
engagement feels “right,” turn the pipe by hand as far as it will go.
3. Use a pipe wrench to fully tighten the valve to the pipe. Do not over
tighten or strip threads.
Normal Thread Engagement Between Male Pipe Thread and Valve Body.
Valve Size Inches
(NPT)
Normal Engagement
1/2” 1/2”
3/4” 9/16”
1” 11/16”
1-1/4” 11/16”
Normal Thread Engagement.
Pipe threads too long.
Pipe interferes with seat.
Wrong
Use pipe wrench to
prevent valve from turning
Tighten pipe using
this pipe wrench
Valve
Assembly
VB-7211-0-3-P
Union Angle
Use pipe wrench to
prevent valve from turning
Tighten pipe using
this pipe wrench
Valve
Assembly
VB-7211-0-4-P
Union NPT
VB-7XX4 Union Sweat Valve Bodies
1. Remove both tail pieces and union nuts from the valve body. Apply flux to the tail pieces and pipe before sweating into place.
Make sure the union nuts are mounted on the tail pieces before sweating.
Caution: Do not sweat the tail pieces in place while they are mounted to the valve body. The excess heat will damage the valve
body.
2. Re-install the valve body. Start the joint by hand screwing the union nut onto the valve body. If the thread engagement feels
“right,” turn each union nut by hand as far as it will go.
3. Using a pipe wrench to hold the valve, fully tighten the union nut to the valve. Do not over tighten or strip the threads. Take
care not to apply torsion across the valve body.