Installation
April 2020 4-48 06-237619-001
4-21 SELECTOR VALVES
4-21.1 1-inch, 1 1/2-inch, and 2-inch Selector Valves
Install the 1-inch, 1 1/2-inch, and 2-inch selector valves by following the steps listed below:
1. Inspect the valves to verify the threads are not damaged.
2. Kidde recommends installing union fittings before and after the valves to facilitate future
service work.
3. Apply Teflon tape or pipe sealant to the piping male threads.
4. Valves can be installed horizontally or vertically.
5. Ensure the piping is properly supported with pipe hangers prior to installing the valves.
6. Use high pressure air, nitrogen, or CO
2
to verify the valves allow flow in the direction shown
by the arrow on the valve body.
4-21.2 3 and 4 inch Selector Valves
Install the 3 and 4 inch Selector valves by following the steps listed below:
1. Inspect the gaskets and valve assemblies for damage.
2. Weld the flange connections to the piping in accordance with the ASME B31 Boiler & Pres-
sure Vessel Code.
3. Align the valve body with the flanges, insert gaskets between the valve body and each
flange and insert the bolts through the bolt holes.
4. Tighten the hex nuts.
a. Valves can be installed horizontally or vertically.
b. All valves must be checked to ensure installation in the proper flow direction.
c. Ensure the piping is properly supported with pipe hangers prior to installing the valves.
5. Use high pressure air, nitrogen, or CO
2
to verify the valves allow flow in the direction shown
by the arrow on the valve body.
CAUTION
Do not drip sealant into the internal part of the valve.
CAUTION
All valves must be installed with the arrow on the valve body pointing in the
direction of flow.
CAUTION
All valves must be installed with the arrow on the valve body pointing in the
direction of flow.
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