SERVICE MANUAL
EN
4
ITEM PART
NO.
NO.
QTY.
1
20-262
NUT,
2
20-783
SCREW,
3
20-4401
PLUG,
4
20-2848
ELBOW,
5
20-5632
NIPPLE,
6
83-2744* GAUGE,
7
84-328
DISC ......................................... 2
8
84-330▲
DIAPHRAGM,
9
84-348*
CONNECTOR ............................... 1
* Optional, not furnished. Please order separately.
▲ A lso available in Soft Seal Repair Kit 6-1310.
Kit not included, please order separately.
■ A lso available in Valve Repair Kit 6-1312.
Kit not included, please order separately.
77-1889-R15 (3/2021)
MODELS 84-404 AND 84-504
STAINLESS STEEL BACK PRESSURE FLUID VALVES
MODEL
INLET & OUTLET FLOW COEFFICIENT
84-404
84-504
6
9
15
8
16
8
16
19
5
18 20
PARTS LIST
When ordering, please specify Part No.
DESCRIPTION
.................................. 1
1/2-13
.............................. 6
1/4-20
.............................. 1
1/4 NPT
............................ 1
1/4 NPT
........................... 1
1/4 NPT
............................ 1
200 PSI
..................... 2
NYLON
SEE PAGE 3 FOR INSTRUCTIONS.
3/4 NPT(f)
CV = 2.0 MAX.
1
⁄
NPT(f)
CV = 2.0 MAX.
1
4
10
84-351
HANDLE ..................................... 1
11
84-359
BONNET ..................................... 1
12
84-362
RETAINER .................................. 1
13
84-363 ■
VALVE
14
84-365
SPRING ..................................... 1
15
84-388▲
GASKET,
16
84-399▲
DIAPHRAGM,
17
84-454 ■
SEAT
18
84-455
BODY,
19
84-463▲
GASKET,
20
84-489
BODY,
21
85-10
BUTTON ..................................... 1
NOTE: The following items are obsolete
(refer to Part Sheet 1889R-7):
84-530 BACK PRESSURE VALVE
84-544 BACK PRESSURE VALVE
1 / 4
10
1
11
21
Torque screws to
72 inch pounds.
14
12
2
19
See insets
at left for
8
detailed view.
16
15
3
17 13 7
.................... 1
(84-404, 84-504)
...................... 1
VELLUMOID
....................... 2
PTFE
..................... 1
(84-404, 84-504)
................ 1
3/4 NPT(f) (84-404)
...................... 1
VELLUMOID
.............. 1
1-1/4 NPT(f) (84-504)
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