Pulsafeeder GLM1, Installation Operation & Maintenance

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2. Relieve all pressure from the piping system.
3. Take all precautions necessary to prevent contamination
to the environment and personnel exposure to hazardous
materials.
4. Close the inlet and outlet shutoff valves.
5. Loosen the suction valve tie-bar bolts (4) and spring the
suction piping slightly away from the head, allowing liquid
to drain. It may be necessary to loosen a union or flange.
Caution – Process fluid may drain from the Piping. Take
necessary precautions.
6. Remove the suction check valve assembly by sliding it
towards you, holding it together as a unit. Note carefully
the position of the component parts, to assist in re-
assembly.
7. Loosen the discharge valve tie-bar bolts (4) and spring the discharge
piping slightly away from the head, allowing liquid to drain.
It may be necessary to loosen a union or flange.
Caution – Process fluid may drain from the Piping. Take necessary precautions.
8. Remove the discharge check valve assembly by sliding it towards you, holding it together as a
unit. Note carefully the position of the component parts, to assist in re-assembly.
9. Disassemble both valves and check components for wear or damage. The seats should have a
sharp edge and be free from dents or nicks. Hold a ball firmly against the seat in front of a bright
light and inspect for fit. Observation of light between the ball and seat is cause for replacement.
10. Reassemble both valves using new parts as required. Sealing o-rings should
always be replaced.
11. Replace both valve assemblies onto the pump, taking care to ensure they are
oriented correctly, with the balls above the seats, and the seats oriented with the
sharp edge up and the chamfered edge down.
Inserting the check valve assmbly into the pump in the wrong directiom, or
having the check seat upside down, will prevent proper seals at the o-
rings, decrease pump performance, and can cause damage to the
diaphragm.
12. Carefully make sure that the check assemblies are in proper position,
and tighten the four tie-bar bolts, using a star pattern, to a torque of
6 ft-lbs (8 n-m).
13. Retighten any unions, flanges, or other process connections that may
have been loosened previously.
Figure 14: Tie Bar Style
Metal Valves
Figure 15: Metal
Valve Assembly
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