Operating instructions

SHERWOOD LPG PRODUCTS
Instruction Sheets
Filler-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. On valves 1855SD and 1855SD-30, remove the
valve cap. Destroy the O-ring inside the ACME
connector so it cannot be reused. On valves
1855SPD, 1855SVFD, and 1855SD-90, disconnect
any tubing at the upper section of the valve.
4. Using the tool appropriate to the valve (Allen
wrench, crowfoot adapter, or socket), remove
(turn counterclockwise) the upper body section
from the valve. If necessary, prevent the lower
valve section from turning by holding it steady
with the adjustable wrench (or 1
3
⁄4" open-end
wrench). Note that the upper section of valve
1855SD is completely inside the lower section
and is removed with the Allen wrench.
5. Remove the poppet and poppet spring.
Destroy the parts so they cannot be reused.
6. Remove and discard the O-ring where the upper
and lower valve sections mate. Destroy the
O-ring so it cannot be reused.
Step 2: Inspection
1. Inspect the internal valve shoulder of the lower section, where the O-ring 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. If any are damaged or worn, replace the entire valve. Destroy the
old valve so it cannot be reused.
3. Inspect the bottom mating-seat rim of the upper section. If the rim is nicked, scratched, or distorted,
replace the entire valve. Destroy the old valve so it cannot be reused.
Tools Required (Specific Valve)
4. Replace the entire valve if any of the upper-section threads are damaged or worn. Destroy the old
valve so it cannot be reused.
5. Inspect the poppet seat of the upper section. If this seat is nicked, scratched, or distorted, replace
the entire valve. Destroy the old valve so it cannot be reused.
6. On valves 1855SD and 1855SD-30, inspect the ACME threads. If damaged or worn, replace the
entire valve. Destroy the old valve so it cannot be reused.
7. Using a fine wire brush, clean the old threadlocking residue from the fine female threads of the
lower section. Blow the valve clean with compressed air.
8. Where the upper section of the valve can be reused, clean the fine male threads that screw into the
lower section.
9. Inspect the internal poppet guide post for wear or nicks around the center guide hole. If any are
present, replace the entire valve. Destroy the old valve so it cannot be reused.
10.
Inspect the valve cap. If it is cracked, worn, loose, or defective in any way, replace the cap. Use part
#1850-10.
Step 3: Re-Assembly
1. Lubricate a new #G021B O-ring with a mild, ammonia-free, soap-and-water solution. Shake off the
excess liquid and install it into the valve at the O-ring seat. Be careful not to get any liquid on the
female threads since it prevents the threadlocking adhesive from curing properly.
2.
Put three to four drops of omniFIT
®
1570 or Loctite
®
272 on the middle male threads of the new
ACME connector.
3. Install the new poppet spring onto new poppet stem. Guide the poppet stem through the guide hole
in the middle of the poppet guide.
4. Push the poppet and spring all the way down and use a pencil or wooden dowel to hold it down.
Slide the upper section over the dowel and turn clockwise until the fine threads engage. 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. Continue screwing the upper section into the lower section until it begins to bottom out. Inspect
the O-ring. Make sure it is not sticking out anywhere around the seal. If it appears OK, immediately
tighten the sections between 30 to 40 foot-pounds of torque. Do not overtighten the sections.
6. Push the poppet down several times to make sure it moves without binding.
7. On the 1855SD and 1855SD-30, install a new #G216B O-ring into the inlet of the ACME fitting.
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 top section screws into the valve body. As a precaution,
check the valve-to-tank connection as well.
2. On 1855SD, 1855SD-30, and 1855SPD, carefully place two or three drops of commercial leak-test
solution around the poppet seat and inspect for leaks. Keep your body away from the valve opening.
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. On 1855SVFD and
1855SD-90, screw a
1
⁄2" SAE cap on the inlet for two or three turns. Apply a commercial leak-test
solution around the cap and valve threads and inspect for leaks.
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. Replace it
with a new valve.
4. If no leaks were found, the valve may now be placed in service. On 1855SD and 1855SD-30 valves,
make sure the valve cap is in place and tightened.
Warn Your Customer
t Leaking gas can cause fires or explosions
t If you smell gas:
- 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
1855SD
1855SD-30
1855SPD 1855SVFD 1855SD-90
B
ODY O-RING
#G021B
POPPET
#1855D-50
SPRING
#2030-7
FILLER O-RING
#G216B
(1855SD & 1855SD-30 ONLY)
* Must be approved for use on brass and with LP gas.
Note: Torque wrench, socket wrench, and crowfoot adapter should all have the same drive size.
Valve 1855SD
R
1
⁄2" Allen wrench
R
1
⁄2" crowfoot adapter
Valve 1855SD-30 Valve
R
1
1
⁄16" crowfoot adapter and wrench
Valve 1855SPD
R
1
3
⁄8" socket and wrench
Valve 1855SVFD
R
13
⁄16" socket and wrench
1855SD-90
R
1 3
⁄16" (12mm) crowfoot adapter and
wrench
Tools Required
R A large adjustable wrench or 1
3
⁄4"
open-end wrench
R Small, fine wire brush
R Small wooden dowel
R Torque wrench, 0–50 foot-pounds
R Commercial leak-test solution*
R Mild ammonia-free soap-and-water
solution for lubrication
SAFETY INSTRUCTIONS
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Figure 2
Figure 1
Filler O-Ring
#G218B
(1855SD & 1855SD-30 Only)
Body O-Ring
#G021B
Poppet
#1855D-50
Spring
#2030-7
1855SD 1855SD-30
1855SD-901855SVFD1855SPD
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