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High Pressure Pump Servicing Instructions – Page 3

Replacing the Valves

Overview

Each of the three cylinders in the pump has two spring loaded one way valves. One valve allows water to be

pushed into the cylinder by the lift pump as the piston retracts. The second valve opens as the piston forces

the water under high pressure through the manifold. O-rings are used to seal around the valves.

Only one valve kit (RM01) is necessary to replace all the valves in the pump. The kit includes new O-rings and

valve assemblies.

Exploded view of WMR series manifold, showing valve configuration

Содержание WM Series

Страница 1: ...WM and WMR Series High Pressure Pump Service Rainman Technology Pty Ltd 17 10 18 Orchard Road Brookvale NSW 2100 Australia www rainmandesal com support rainmandesal com 61 433 826 626 Version 1 1...

Страница 2: ...iption 1 Routine Pump Maintenance 2 Oil Change 2 Preventing Cavitation 2 Replacing the Valves 3 Overview 3 Procedure 4 Replacing the Packings 6 Overview 6 Procedure 7 Setting Relief Valve 12 Troublesh...

Страница 3: ...ls of maintenance on more heavily used systems Depending on which Rainman watermaker model you own there will be one of two different high pressure pumps in your system If you have the older Mk1 elect...

Страница 4: ...rating pressure and flow rates so the oil break down is slower than normal operation for this design As such it is not critical to maintain high discipline on this oil change schedule The method to ch...

Страница 5: ...ed into the cylinder by the lift pump as the piston retracts The second valve opens as the piston forces the water under high pressure through the manifold O rings are used to seal around the valves O...

Страница 6: ...ve cap Examine threads and O ring Replace O ring item 1 if there is any evidence of cuts abrasions distortion or wear 2 Remove valve assembly item 2 from valve cavity 3 Remove valve seat O ring item 3...

Страница 7: ...p Servicing Instructions Page 5 6 Insert valve assembly item 2 into valve cap as shown 7 Coat the threads of the valve cap with anti seize grease such as Renolit ST 80 and reinstall valve cap Torque t...

Страница 8: ...t from leaking out of the pump along the pistons The hard high pressure seals contain the pressure within the manifold of the pump but some moisture slides out with the piston on each stroke The softe...

Страница 9: ...ut them on before proceeding Glyd high pressure seal item 5 in diagram Square high pressure seal item 6 in diagram Procedure 1 Remove head bolts using a 5mm Allen key and slide manifold away from the...

Страница 10: ...a slight rocking motion Since they are being replaced damage to the old packings is inconsequential Important take care not to score or mark the manifold s machined surfaces 4 Remove high pressure se...

Страница 11: ...anifold cylinder Do not grease any portion of the packing assembly during this step 8 Gently place assembled glyd rings items 5 6 inside insertion guide item 8 so they are resting evenly 9 Insert push...

Страница 12: ...3 4 ensuring recess for seal is facing upwards 11 Gently place low pressure seal item 2 into the guide item 7 ensuring the open spring side of the seal is facing toward the casing and resting evenly 1...

Страница 13: ...casing itself 14 Check that spacer rings item 1 are on each plunger as per photo These rings are non wearing so it is not required to replace them Apply a very thin coating of silicone grease to each...

Страница 14: ...limiting the maximum output pressure of the PSU to approximately 69 bar 1000 psi All relief valves are set in the Rainman factory during final testing of each system In the highly unlikely event that...

Страница 15: ...kwise until it is fully closed whilst watching the pressure on the gauge New relief valves from the factory are typically pre set to a low pressure so you should be able to close the valve fully befor...

Страница 16: ...hooting The troubleshooting table is highly technical and specific only to the high pressure pump not your Rainman watermaker in general In the vast majority of operational troubleshooting issues you...

Страница 17: ...High Pressure Pump Servicing Instructions Page 15 Maintenance Log...