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MILROYAL B and C Disc ® Diaphragm Liquid End Instruction Manual Manual No : 54145 Rev. : 00 Rev. Date : 12/2015...
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PRECAUTIONS The following precautions should be taken when working with metering pumps. Please read this section carefully prior to installation. Protective Clothing ALWAYS wear protective clothing, face shield, safety glasses and gloves when working on or near your metering pump. Additional precautions should be taken depending on the solution being pumped.
SECTION 1 - DESCRIPTION This Instruction Manual is designed to serve as Each suction stroke of the plunger pulls the a supplement to Instruction Manuals 53943 and diaphragm towards the oil side contour plate so 53939, which provide both general information that process liquid flows into the displacement and specific instructions for installing, operating, chamber through the suction ball-check valve.
SECTION 2 - INSTALLATION 2.1 UNPACKING 4. Drill a 1/4” (6 mm) diameter hole OFF the vertical center line 2 1/2” (64 mm) below the Units are shipped Free on Board (FOB) factory top machined edge of the pump casing wall in and title passes to customer when carrier signs for which seals are installed.
SECTION 2 - INSTALLATION 2.2.2 MILROYAL C (See Figure 5) 9. Install air-bleed valve in top of displacement ® chamber. Install hose connection (402-10 1. Remove Packed Plunger Liquid End assembly and tubing for on return from valve to pump from pump (see pump drive disassembly casing.
Main Tank 4. Filter sludge by installing a glass wool filter or Sludge Milton Roy Sludge Trap in the suction line. Trap The first and last of these precautions will benefit any size pump by removing the high proportion of...
SECTION 3 - OPERATION 3.1 INITIAL START-UP 2. Turn refill valve adjusting nuts clock wise to reduce loading on spring until valve stem, After installing the pump and the Disc Diaphragm and nut move very slightly with each suction Liquid End, perform the following operations before stroke of the pump plunger.
SECTION 3 - OPERATION 3.3.3.1 Disassembly KEEP HANDS AWAY FROM Remove and disassemble plastic check valves as RECIPROCATING PLUNGER AND CROSSHEAD. follows (See Figure 5). 8. Loosen relief valve adjusting screw and repeat 1. Unscrew check valve assembly from diaphragm step 7 until the maximum pressure gauge head.
SECTION 3 - OPERATION 3.3.4.2 Reassembly The parts below are needed for all sizes & material Clean all parts for reassembly, then proceed as Disc Diaphragm liquid ends. follows. Drawing 1. Set oil side contour plate in displacement Location Description Reference chamber, oriented as in step 4 above.
SECTION 4 - TROUBLESHOOTING Pump drive Instruction Manuals list most possible malfunctions, their causes and cures. The following problems peculiar to Disc Diaphragm Liquid Ends may be remedied as indicated below. • Low discharge line pressure. Increase line pressure Excessive delivery (e.g., install a back pressure valve).
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PARTS LIST FOR FIGURE 4. Drawing Location Reference Description 2090 Air Bleed Valve Assy 2070 Refill Valve Assy 2080 Relief Valve Assy Base 2074 Refill Valve Stem Nut 2071 Refill Valve Adjusting Nut 2030 Plunger Assy 1900 Displacement Chamber 2076 Refill Valve Body 2000 Check Valve Assy...
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Drawing Location Reference Description Pipe Plug Hose Connection 2050 Mounting Bolt 1990 Diaphragm Head Bolt Var. 1960 Dia Head Bolt Var. 1992 Ball Check Air Bleed Valve Ball Check Relief Valve Ball Check 3000 Tubing Shaft Seal Air Bleed Valve Plug Air Bleed Valve O-Ring Seal Instruction Manual...