Alfa Laval Rotary Lobe Displacement Pump GHPD-722

1. The pump will NOT be supplied oil filled.

2. First change - After 150 hours of operation.

3. Fill with oil through the filler plug to the level indicated in the sight glass.;

– The seal rotary face is driven by a pin which locates in a slot on the shaft. A washer is located between the shaft shoulder and rotary face. A seal between the rotary face and shaft is provided by an 'O' ring.

– The stationary face is prevented from rotating as it has a flat side which sits in the rotorcase bore. Face to face contact is provided by a wave spring. Axial movement of the stationary face is prevented by a retaining clip. An 'O' ring within the rotorcase bore provides a seal onto the stationary face.

CAUTION! SEAL FACES ARE BRITTLE - TAKE EXTREME CARE WHEN HANDLING.

1. Carefully support and remove the rotorcase with the stationary sealing face still within its bore.

2. Slide the remaining rotary face from the shaft.

3. Release the retaining clip and remove the stationary face for inspection.

1. Use solvent to wipe the lapped surface of the seal faces until PERFECTLY clean, being extremely careful not to scratch the faces.

• The pump can be manually cleaned or cleaned in place (C.I.P.). The following is an example of a typical CIP procedure. However specific advice for each application should be sought from the pump supplier.

1. Flush through the system with cold water (42°F).

2. Run hot caustic soda (158-176°C) at 2.5% dilution through the system for 20-30 minutes.

3. Final flush through with cold water again.

NEVER touch the pump or pipes as they will be extremely HOT!

DO NOT subject the pump to rapid temperature changes during C.I.P. procedures, as pump seizure can result from thermal shock. A suitable by-pass is recommended.

ALWAYS use rubber gloves and protective when handling caustic agents.

ALWAYS rinse will with clean water using a cleaning agent.

ALWAYS store/discharge cleaning agents in accordance with current rules d/directives.;

– The large 'O' ring sits within the rotorcase bore and runs on the shaft sleeve. Rotation for the shaft sleeve is provided by a spring which locates in a slot on the shaft. An 'O' ring seals the shaft sleeve to the shaft.

2. Slide the shaft sleeve from the shaft and inspect the 'O' rings.

1. Lightly lubricate the 'O' rings with greas (food quality if necessary), locate in the shat sleeve and rotorcase bore.

2. Slide the shaft sleeve onto the shaft an locate the pin into the slot on the shaft.;

– The packing rings are located within the gland housing and are tightened onto the shaft sleeve by adjusting the gland follower. On flushed packed glands a lantern ring replaces the middle ring of packing. The shaft sleeve is retained to the shaft by three socket set screws and is sealed by an 'O' ring.

1. Release and pull back the gland follower.

2. Remove the rotorcase with gland housing, packing and gland follower still assembled.

3. Loosen the shaft sleeve socket set screws and extract the sleeve from the shaft.

4. Inspect and replace the packing and shaft sleeve if necessary.

1. Lubricate the 'O'ring, locate in shaft sleeve and slide onto the shaft.

2. Tighten up the socket set screws.