Pomac Pumps PLP - Assembly of a Safety Valve; Assembly of a Spring-Loaded Safety Valve; Assembly of an Air-Loaded Safety Valve; Filling with Oil

User manual Pomac PLP Lobe pump
CE/PLP (1406) EN-12 41
7.17. Assembly of a safety valve
7.17.1. Assembly of a spring-loaded safety valve
See paragraph 9.9 for the drawing and parts list.
1. Put the pump cover flat down.
2. Lubricate the O-ring lightly with some food compatible grease, fit it around the plunger and
push the plunger into the hole in the pump cover.
3. Entirely screw the pressure disk (10) onto setscrew (11).
4. Fit the pressure disk with the setscrew into the safety valve casing (6). The guiding pin must
correspond to the hole in the pressure disk. Tighten the locknut (12) by hand.
5. Fit the spring onto the plunger.
6. Fit the safety valve casing over the spring. Fix it with cap nuts (8).
7. Fit the O-ring, mount the pump cover to the pump and fix it with the cap nuts.
8. The adjustment of the spring of the safety valve must be carried out on-site, during process
conditions. See paragraph 5.3.
7.17.2. Assembly of an air-loaded safety valve
See paragraph 9.10 for the drawing and parts list.
1. Fit the O-rings (10) and (11) around the plunger (1), using some food compatible grease.
2. Put the plunger flat down and fit the spacer bush (2) in the plunger.
3. Fit the O-ring (9) inside the intermediate ring (4), using some food compatible grease.
4. Fit the intermediate ring to the spacer bush.
5. Fit the O-ring (12) around the piston (3), using some food compatible grease.
6. Fit the piston to the spacer bush and fit the Allen screw (14).
7. Put the pump cover flat down and place the entire subassembly in the pump cover.
8. Fit the O-ring (13) in the groove of the intermediate ring, using some food compatible grease.
9. Fit the safety valve casing (5) over the piston.
10. Fit the fixation screws (7) to fix the entire assembly to the pump cover.
11. Fit the O-ring, mount the pump cover to the pump and fix it with the cap nuts.
12. Setting the air pressure on of the safety valve must be carried out on-site, during process
conditions. See paragraph 5.3.
7.18. Filling with oil
See paragraphs 9.1 and 9.2 for recommended oil types and quantities.
1. Unscrew the oil fill plug.
2. Fill the gearbox with oil till it shows at the centre of the oil sight glass.
3. Check the oil level after a couple of minutes.
4. Top up if necessary.
5. Fit the oil fill plug.