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