DH Instruments 401828 Instruções de instalação

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MPC1 VARIABLE VOLUME REPAIR KIT,

P/N 401828, INCLUDES:

QTY

PART NO

DESCRIPTION

103112

O-ring, 607A001-02

103113

O-ring, 607X001-04

103114

O-ring, 607X001-05

103115

O-ring, 607X001-06

103116

O-ring, 607X001-08

103117

O-ring, 607X001-07

103118

Back-up ring, 607A002-02

103119

Back-up ring, 607X002-05

Refer to drawing on overleaf for location of

assembly parts listed in the following instructions.

DISASSEMBLY OF THE BALANCE VALVE:

Remove the top cover of the unit by removing the four

screws under the gray tabs.

Remove the balance valve knob (27), this is secured

with a set screw through the side of the knob.

Remove the allen head screws that secure the balance

valve to the body and remove the assembly.

Using a 1/2 inch wrench, remove valve retaining

nut (22) and the spool valve (21) from the body.

Separate the spool valve (21) from the retaining

nut (22) and replace the O-ring (14) on the spool valve.

Remove the front packing nut (8) from the retaining

nut (22) and replace the back-up ring (19),

O-ring (14) and outer O-ring (13).

Remove the rear packing nut (8) from the valve

body (6) and replace the back-up ring (19) and the

O-ring (14).

ASSEMBLY OF THE BALANCE VALVE:

Install front packing nut (8) into retaining nut (22).

DO NOT TIGHTEN.

Insert spool valve (21) into retaining nut (22) through

the O-ring, back-up ring and into the retaining nut.

Tighten the packing nut (8) to compress the O-ring

and back-up ring around the spool valve shaft.

MPC1 Variable Volume

Repair Kit

Installation Instructions

Install the retaining nut (22) and spool valve (21) into

the body (6).

Tighten the retaining nut (22) into the body (6).

Replace O-rings (15) and install balance valve to the

body (5).

Install valve knob (27) and check operation of the valve.

DISASSEMBLY OF THE PRESSURE VOLUME:

Remove the pressure line from the rear of the volume

assembly.

Remove the eight retaining bolts (11) and the end

cap (7) from the body (5).

Remove the adjustment knob (26) from the front of

the controller, this is secured by a set screw on the

side of the knob.

Remove the retaining ring (20).

Turn the shaft clockwise until the lead screw (3)

is separated from the actuator (2).

Insert long screwdriver into the body (5) and gently

push the actuator (2) out of the rear opening.

ASSEMBLY OF THE PRESSURE VOLUME:

Clean and inspect the lead screw (3).

Remove and replace the back-up ring(18) and

O-ring (13).

Replace the O-ring (17) on the piston (23).

Install the actuator assembly into the body (5) and

through the actuator washer (4).

Apply lubrication to the threads of the lead screw (3)

and insert the screw assembly into the body (5).

Turn the shaft counter clockwise until the lead screw (3)

is threaded into the actuator assembly (2).

Install the retaining ring (20) into the body to secure

the shaft.

Replace the end cap O-ring (16) and install the end

cap (7) into the body (5).

Install and tighten the eight retaining bolts (11) for

the end cap.

Install the adjustment knob (26) and rear pressure line.