Alfa Laval Rotary Lobe Displacement Pump GHPD-422

CAUTION! COMPLETE DISASSEMBLY IS ONLY REQUIRED IF THE 'O' RINGS OR SPRINGS ARE TO BE REPLACED.

- The relief valve should not be disassembled while the plug is in operation. Always observe the safety precautions detailed at the front of this manual.

- Take extreme care when removing the springs as they have been compressed.

2. Release and remove the notched nuts) with the spring adjuster.

3. Take off the springs, release the socket head cap screws and remove the valve guide.

4. Access to the pneumatic piston 'O' rings is achieved by releasing the circlip which locates in the valve shaft.

5. The hydraulic piston with the shaft may be lifted out of the front cover once the backstop disc is removed.

– 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.;

If yes, change grease every two years. If no, change every six years.

Has the grease been changed according to the schedule?

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

Sign off on the grease replacement

Warning: The pump will NOT be supplied oil filled.

Enter the current hours of operation

Has the pump been operated for 150 hours?

If yes, proceed to oil replacement. If no, wait until 150 hours of operation.

Did you fill the oil through the filler plug to the level indicated in the sight glass?

Sign off on the oil replacement

• 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.;