Haier 3150 SB User Manual

The air valve is designed to operate unlubricated, how-
ever if lubrication is desired, every 500 hours of opera-
tion (or monthly) remove the hose from the pump air 
inlet and add two drops of machine oil to the air inlet.

Insert suction tube into cleaning solution. Open air regu-
lator to supply low pressure air to the pump. Run the 
pump long enough to thoroughly clean the pump and 
hoses. Close the air regulator. Remove the suction tube 
from the cleaning solution and drain pump. Place suc-
tion tube in the fluid to be pumped.

Flush the pump often enough to prevent the fluid you 
are pumping from drying or freezing in the pump and 
damaging it. Flushing schedule will be based on what 
the pump is being used for. Use a compatible cleaning 
solution and always cycle the pump during the entire 
flushing process.

Always flush the pump and relieve the pressure before 
storing it for any length of time.

 

1.

Flush the system. See Flushing above.

2.

Relieve pressure in the system. See Pressure 
Relief Procedure on page 10.

3.

Disassemble the fluid section of the pump and 
accessories. See Check Valve Repair on page 19 
and Diaphragm Repair on page 21.

4.

Using a brush or other C.I.P. methods, wash all 
product contact pump parts with an alkaline deter-
gent at the manufacturer’s recommended tempera-
ture and concentration.

5.

Rinse these parts again with water and allow parts 
to completely dry.

6.

Inspect the parts and reclean any soiled parts. 

7.

Immerse all product contact parts in an approved 
sanitizer before assembly. Leave the parts in the 
sanitizer, taking them out only one by one as 
needed for assembly. See Check Valve Repair on 
page 19 and Diaphragm Repair on page 21.

8.

Lubricate the clamps, clamping surfaces, and gas-
kets with waterproof sanitary lubricant.

9.

Circulate the sanitizing solution through the pump 
and the system prior to use. Cycle the pump as the 
sanitizing solution is circulated.

Before each use, check all hoses for wear or damage, 
and replace as necessary. Check to be sure all connec-
tions are tight and leak-free.

Do not over-lubricate the pump. Oil is exhausted 
through the muffler and could contaminate your fluid 
supply or other equipment. Excessive lubrication can 
also cause the pump to malfunction.

The pump and the system should be cleaned in 
accordance with your state sanitary standard 
codes and local regulations.