Operating instructions
Vapor-Return Section Replacement Procedures
Step 1: Disassembly
1. Remove all traces of LP gas from the cylinder using the procedures specified in National Fire
Protection Association Pamphlet #58 and National Propane Gas Association Installation and Service
Guide Book #4003.
2. Clean the valve with clean compressed air so dirt does not enter the valve’s interior.
3. Remove the liquid-level stem valve located on the top of the main valve body. Destroy the part so it
cannot be reused.
4. Use the socket wrench and 1
1
⁄4" socket, remove (turn counterclockwise) the ACME threaded vapor-
return connector. Destroy the connector so it cannot be reused.
5. Remove the poppet and poppet spring. Destroy the parts so they cannot be reused.
6. Remove the flat metal gasket that seals the ACME connector to the valve body. Destroy the gasket
so it cannot be reused.
SHERWOOD LPG PRODUCTS
Instruction Sheets
Bonnet and Handwheel Inspection
Before evacuating the tank, make sure the bonnet assembly is in good working order. There must be
at least 35 psig of cylinder pressure to perform this test. Plug the valve outlet with a POL plug. Open
the outlet valve halfway and thoroughly check the bonnet nut and stem for leaks using a commercial
leak-test solution.
Turn the handwheel clockwise until the
bonnet just bottoms on the seat. Tighten the
handwheel approximately one tenth of a turn
further. Carefully remove the outlet plug.
Thoroughly check the outlet for leaks using
a commercial leak-test solution. If any leak
is found during either of the above tests,
the bonnet assembly must be replaced (see
Sherwood Instruction Sheet I-3329, Filler-
Section Replacement Procedures).
3. Using a fine wire brush, clean the old threadlocking residue from the fine female threads where the
ACME connector screws into the valve. Blow the valve clean with compressed air. Clean all other
threads as necessary.
4. Inspect the poppet guide for wear or nicks around the center guide hole. If any are present, contact
Sherwood for a replacement. The poppet guide may be reused if it is in good condition.
5. Inspect the vent opening on the top of the valve. If the orifice sealing surface is corroded, clean it
with a toothbrush and alcohol. If the orifice sealing surface is gouged, dented, pitted, or scratched,
replace the entire valve. Destroy the old valve so it cannot be reused.
6. Inspect the valve cap. If it is cracked or broken, replace with a new cap.
Step 3: Re-Assembly
1. Install a new #2000-19 gasket into the valve at the gasket seat.
2. Install the new poppet spring onto the round stem of the new poppet. The hexagonal poppet stem
must face up as shown. Guide the lower poppet stem through the guide hole in the middle of the
poppet guide.
3. Push the poppet and spring all the way down and use a wooden dowel to hold it down. Slide the
new ACME connector over the dowel and turn clockwise until the fine threads engage.
4. Continue screwing the ACME connector until only two or three of the fine male threads remain
visible. Place two or three drops of omniFIT
®
1570 or Loctite
®
272 on the threads. NOTE: Loctite
272 will begin to cure within seconds of being confined within brass threads. If this happens before
the following tightening procedure is completed, the sections must be separated, cleaned, and
reassembled.
5. Make sure the metal gasket is correctly positioned in its seat. Using the torque wrench and 1
1
⁄4"
socket, tighten the ACME connector with 50 to 60 foot-pounds of torque. Do not overtighten.
6. Push the poppet down several times to make sure it moves without binding.
7. Install the new liquid-level stem into the top of the valve body and tighten finger tight.
8. Install the new gasket into the inlet of the new ACME connector.
Step 4: Testing
1. Pressurize the cylinder with LP gas at 50 to 150 psig. Using the commercial leak-test solution
specified above, check for leaks where the ACME vapor return connector screws into the valve body.
As a precaution, check the valve-to-tank connection as well.
2. Keep your body away from the valve inlet. Carefully place two or three drops of commercial leak-test
solution around the poppet seat and inspect for leaks. When complete, use a clean cloth or paper
towel to remove the excess liquid. Do not use a soap-and-water solution for this test — it could
corrode the internal parts.
3. If any leaks are found, evacuate the tank according to NFPA Pamphlet #58 and NPGA Installation
and Service Guide Book #4003. Remove and destroy the entire valve so it cannot be reused. Install
a new valve.
4. If no leaks were found, the valve may now be placed in service. Make sure the valve cap is in place
and tightened.
Warn Your Customer
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- Immediately call your gas supplier from a neighbor’s phone
- If you can’t reach your gas supplier, call the Fire Department
- Do not touch electrical switches or telephones
- Do not light appliances
* Must be approved for use on brass and with LP gas.
Tools Required
R Socket wrench
R Torque wrench, 0–50 foot-pounds
R Deep hex socket, 1
1
⁄4"
R Small, fine wire brush
R Small wooden dowel
R
Petroleum jelly lubricant
R Toothbrush and alcohol
R Commercial leak-test solution*
SAFETY INSTRUCTIONS
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Step 2: Inspection
1. Inspect the internal valve shoulder where the metal gasket seats. If the seat is nicked, scratched, or
distorted, replace the entire valve. Destroy the old valve so it cannot be reused.
2. Inspect all threaded connections. Replace the entire valve if any threaded connection is damaged or
has worn threads. Destroy the old valve so it cannot be reused.
Figure 2
GASKET
#797-2
POPPET
#2033-130
BODY GASKET
#2000-19
POPPET SPRING
#2000-16
ACME CONNECTOR
#2000-3
LIQUID-LEVEL STEM
#1931-24A
Figure 2
Liquid-Level Stem
#1931-24A
Body Gasket
#2000-19
Poppet Spring
#2000-16
AMCE Connector
#2000-3
Gasket
#797-2
Poppet
#2033-130
H
A
V
Figure 1
Handwheel
Valve Outlet
NOTICE:
All Sherwood products must be used in strict compliance with the requirements
and provisions of National Fire Protection Association Pamphlets #54 and #58,
DOT, ANSI, and all applicable federal, state, provincial, and local standards, codes, regulations, and
laws. It is the responsibility of the sellers, installation and maintenance personnel, and end users to
remain knowledgeable of and in compliance with all standards, codes, regulations, and laws.
All Safe, Inc. 1-866-958-3473