Operating instructions

Figure 2
Figure 2
Figure 1
Gasket
Figure 1
Gasket
SHERWOOD LPG PRODUCTS
Instruction Sheets
Liquid Transfer Procedures
Step 1
1. Loosen the cap of the Checkmate using two wrenches; one to prevent
the Checkmate
™
from turning while the other loosens the cap by turning
counterclockwise as shown in Figure 2. Do not loosen the cap fully. A bleed
hole in the cap allows for a small accumulation of liquid and gas to escape.
2. If this venting does not stop, re-tighten the cap. Since the Checkmate may be
damaged, use another appropriate procedure to remove the liquid. When the tank
is empty, remove and destroy the damaged Checkmate so it cannot be reused.
Step 2
1. Apply a thread sealant, suitable for LP gas, to the pipe threads of the transfer valve.
Make sure the gasket is in place on the bottom of the adapter as shown in Figure
1. Screw the adapter onto the transfer valve and, using two wrenches, tighten the
adapter until snug. Do not overtighten.
2. Before you screw the valve and adapter assembly into the Checkmate, open the
transfer valve as shown at the left in Figure 1. This keeps the Checkmate closed,
preventing a large release of LP gas when the transfer valve is installed. Do not use
pipe dope on the male threads of the adapter. Screw the assembled transfer valve
and adapter clockwise into the Checkmate and hand tighten until snug. A small,
steady release of LP gas is normal at this time. This release will stop when the
transfer valve is closed.
3. With a wrench, turn the valve approximately an eighth to a quarter turn further
to ensure a snug fit. Do not overtighten. The assembly should resemble Figure 3,
without the transfer pipe installed. The adapter seals with a gasket. If the transfer
valve-to-adapter joint leaks when installed on the tank, remove the valve/adapter
assembly and replace the adapter gasket or use a new adapter.
Step 3
1. Turn the handwheel to close the valve, as shown at the right in Figure 1. This allows
tank gas pressure to open the excess-flow valve inside the Checkmate. Liquid LP
gas then enters the transfer valve up to the valve shut-off seat.
2. Attach full-size piping to the outlet of the transfer valve as shown in Figure 3,
and connect this piping to the liquid-transfer equipment.
Step 4
1. Slowly open the transfer valve, filling the piping and hose to the pump with liquid
LP gas. Begin pumping the liquid from the tank. NOTE: Opening the transfer
valve too quickly may cause the excess flow valve in the Checkmate to close,
stopping the liquid flow. Should this occur, equalize the tank and transfer pipe
pressures using the tank’s vapor-return valve. Alternately, open the Checkmate
by momentarily pumping liquid from the transfer equipment back through the
Checkmate into the tank, then reversing the flow to empty the tank. Should these
methods fail, the liquid should be removed using another appropriate method.
The damaged Checkmate must be removed and destroyed so it cannot be reused.
Step 5
1. After the LP gas is removed, close the transfer valve and remove the piping from
the valve outlet.
2. Open the transfer valve quickly and fully. This will cause the tank pressure to
close the Checkmate, but will still allow a small but continuous flow of LP gas at
the transfer valve outlet. NOTE: If the tank pressure is too low because of outside
temperature (less than 15º F), the excess flow valve may not close. If this happens,
close the transfer valve and remove it later when the outside temperature gets
warmer. If anything but a small release of gas persists, or if liquid LP gas is
present at the valve outlet, immediately close the transfer valve and plug the
outlet with an appropriate NPT pipe plug. Do not remove the valve until the tank is
evacuated by another method. Damaged parts must be removed from service and
replaced with new parts.
3. After the Checkmate closes, remove the transfer valve/adapter assembly. Re-install
the Checkmate cap and cap gasket.
Figure 3
SAFETY INSTRUCTIONS
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2341 Series Transfer Valve
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