Alfa Laval Rotary Lobe Displacement Pump GHPD-322

– 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.

– A seal housing encloses the hyclean seal and is seal by an 'O' ring and retained to the rotorcase by socket head cap screws. A lip seal sits within the seal housing and runs on the rotary face, thus providing a seal.

CAUTION! SEAL FACES ARE BRITTLE - TAKE EXTREME CARE WHEN HANDLING. REMOVING THE FLUSHED HYCLEAN SEAL

REMOVING THE FLUSHED HYCLEAN SEAL

1. Carefully support and remove the rotorcase with the seal housing and stationary face still attached.

2. Slide the rotary face from the shaft.

3. Remove the seal housing screws to inspect the seal.

1. Pump supplied grease filled.

2. Change - every two years (dusty air conditions)

* Change - every six years (clean air conditions)

3. Fill with grease by pumping grease into the rear of the gearcase.;

1. The pump will NOT be supplied oil filled.

2. First change - After 150 hours of operation.

3. Only use the oil/grease types recommended by your supplier.

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

1. Firmly press on the o-rings (15) to the rear stationary faces (14) and locate them within the rear flush housing (16,17).

2. Carefully fit the rear seal housings (16,17) with the stationary face onto the shaft (22). (Caution: do not chip stationary face).

3. Push outboard rotary assembly (10,11) onto pump shaft (22) to the setting dimension (A) indicated on the assembly drawing and tighten set screws.

4. Locate o-rings on the shaft (5, rotary) and within the rotorcase bore (1, stationary).

5. Press washer (7) underneath the inside drive pin into the rotary face (6) and gently slide onto the shaft, locating the pin in the shaft slot.

6. Position the wave spring (3) over the stationary face (2), push into the rotorcase.

7. Position front seal housing (9) onto rotorcase and hex head tighten screws (8). Be sure not to over tighten.

8. Refit the rotorcase, using the shaft sleeve to ensure stationary seal is not chipped during assembly.

9. Fit rear seal housings (16,17) and o-rings (12) to front flush housings (9) and tighten the hex nuts (18). (Caution: Be sure not to overtighten the hex nuts).;

1. Checking the oil level in the gearcase (if applicable).

2. Checking the mechanical seals for leakage and replacing as necessary.

3. Adjusting the packed glands to control leakage.

4. Checking the oil seals for leakage.