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Fisher 128-PQC Скачать руководство пользователя страница 3

128-PQC

3

Table 3. Maximum Allowable Shutoff Pressure Drops

FLOWING

PORT

CADMIUM COLORED MAIN

SPRING 14A8831X012

RED MAIN SPRING 14A9077X012

SEATING

ACTUATOR

ACTION

FLOWING

PRESSURE

DROP

PORT

DIAMETER

0 to 20 Psig (0 or
1.4 Bar) Actuator

0 to 35 Psig (0 or
2.4 Bar) Actuator

0 to 20 Psig (0 or
1.4 Bar) Actuator

0 to 35 Psig (0 or
2.4 Bar) Actuator

SEATING

ACTION

DROP

TENDS TO:

Inches

mm

1.4 Bar) Actuator

Input Signal (2

Springs Required)

2.4 Bar) Actuator

Input Signal (4

Springs Required)

1.4 Bar) Actuator

Input Signal (2

Springs Required)

2.4 Bar) Actuator

Input Signal (4

Springs Required)

Inches

mm

Psi

Bar

Psi

Bar

Psi

Bar

Psi

Bar

Spring

Open valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

1510

520
220

30

104

36
15

2.1

3370
1340

690
240

232

92
47
16

3380
1340

700
240

233

92
48
16

3600
3120
1720

710

248
215
118

49

Metal

S ring

closes valve

Close valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

940

1130
1330
2030

65
78
92

140

1860
2450
2920
3600

128
169
201
248

1370
1540
1710
2320

94

106
118
160

2920
3300
3600
3600

201
227
248
248

Spring

opens valve

Close valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

170
530
540

1400

12
36
37
96

350
610

1150
2910

24
42
79

200

Valve will not shut off with this

combination of spring and application

Spring

Open valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

1000

710
400
160

69
49
28
11

1000
1000

830
350

69
69
57
24

1000
1000

830
360

69
69
57
25

1000
1000
1000

790

69
69
69
54

Soft

S ring

closes valve

Close valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

940

1000
1000
1000

65
69
69
69

1000
1000
1000
1000

69
69
69
69

1000
1000
1000
1000

69
69
69
69

1000
1000
1000
1000

69
69
69
69

Spring

opens valve

Close valve

1/4
3/8
1/2
3/4

6.4
9.5

12.7
19.1

560
480
540

1000

39
33
37
69

660
960

1000
1000

45
66
69
69

Valve will not shut off with this

combination of spring and application

Figure 2. Typical Nameplate

24B1860-B / DOC

Installation

WARNING

To avoid personal injury or property
damage resulting from the sudden re-
lease of pressure, do not install the
valve assembly where service condi-
tions could exceed the limits given in
this manual or on the appropriate name-
plates. The leakoff and spring case
vents must be kept open. Avoid danger

of fire or explosion from venting of flam-
mable or otherwise hazardous fluid into
a closed or poorly vented location by
providing adequate ventilation.

1. Before installing the valve, inspect the valve body
and associated equipment for any damage and for any
foreign material.

2. The control valve may be installed in any orienta-
tion. However, the normal method is with the actuator
above the valve, especially for an angle configuration.

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Содержание 128-PQC

Страница 1: ...eeding Figure 1 Type 128 PQC Control Valve W2838 2 IL ALTERNATE LOCATION OF PIPE PLUG FOR USE AS ANGLE VALVE LOCATION OF PIPE PLUG FOR USE AS GLOBE VALVE Description The Type 128 PQC control valve provides on off dump valve service for such oil production applications as separators scrubbers and treaters even under sour gas conditions It also may be used in general on off high pressure control of ...

Страница 2: ...180_F 46 to 82_C Flow Characteristic Quick opening with 45 degree taper valve plug Flow Direction Either way Port Diameters See table 2 Maximum Travel 3 8 inch 10 mm Actuator Diaphragm Effective Area 33 inches2 213 cm2 Actuator Pressure Connections 1 4 inch NPT female Valve Travel Indication Scale divisions for each 25 of travel are provided on plastic travel indicator cover Approximate Weight 17 ...

Страница 3: ...f spring and application Spring Open valve 1 4 3 8 1 2 3 4 6 4 9 5 12 7 19 1 1000 710 400 160 69 49 28 11 1000 1000 830 350 69 69 57 24 1000 1000 830 360 69 69 57 25 1000 1000 1000 790 69 69 69 54 Soft S ring closes valve Close valve 1 4 3 8 1 2 3 4 6 4 9 5 12 7 19 1 940 1000 1000 1000 65 69 69 69 1000 1000 1000 1000 69 69 69 69 1000 1000 1000 1000 69 69 69 69 1000 1000 1000 1000 69 69 69 69 Sprin...

Страница 4: ... 3 With a metal seat the valve uses a caged construction and the valve plug shuts off against the integral seat ring in the cage In the cageless soft seat construction the valve plug shuts off against the seat cut into the web of the valve body A nylon insert in the valve plug thread is used to help keep the valve plug from rotating A leakoff vent passes through the packing box and out the valve b...

Страница 5: ...lve from closing Rotate the handles or handjack body key 48 or 47 in figure 9 if necessary to allow the main springs key 19 to close the valve 2 Remove the four nuts key 14 from the integral screws of the lower diaphragm casing Disconnect the input signal line and lift the actuator and attached trim parts out of the valve body Cleaning or other neces sary maintenance may be performed on any access...

Страница 6: ...move the stem nut and thrust washer keys 49 and 51 in figure 9 2 Disconnect the input signal line if necessary and remove the diaphragm casing nuts key 14 cap screws key 21 and upper diaphragm casing key 20 3 With spring close action remove the existing main springs key 19 and install replacement springs of the correct quantity and description as listed in table 3 Make sure that the springs rest i...

Страница 7: ...hten the locknut to 12 lbf ft 16 N m 10 For spring open action only install the main springs key 19 into the lower diaphragm casing so that the lower ends of the springs rest over the weld stud heads of the lower diaphragm casing 11 Install the stem and diaphragm assembly into the lower diaphragm casing For spring open action make sure that the assembly is oriented so that the spring plate holes f...

Страница 8: ... port 15A6801X012 Key Description Part Number 3A Valve Plug Metal Seat 1 4 3 8 inch ports 440C stainless steel heat treated 1 16A2087X012 Nitronic 50 stainless steel 1 16A2087X022 Carbide seating surface 2 15A6804X012 1 2 inch 12 7 mm port 440C stainless steel heat treated 1 14A6618X012 Nitronic 50 stainless steel 1 14A6618X022 Soft Seat 3 4 inch port Austenitic stainless steel nitrile 15A3197X022...

Страница 9: ...A2323X012 25 O Ring nitrile 1H292606992 26 Machine Screw stainless steel 14A8818X012 27 Spring stainless steel 16A0431X012 28 Pipe Plug steel 1A794728992 29 Lock Washer steel 1A742328992 31 Vent Assembly 35 Diaphragm Casing O ring 13A1584X012 39 O Ring Retainer polyethylene 14A9053X012 40 Bushing PTFE used with metal seat only 10B7431X012 41 Indicator Cover plastic w o handjack 15A1580X012 w handj...

Страница 10: ...V RING PACKING HEAT TREATED 440C STAINLESS STEEL VALVE PLUG AND CAGE TFE V RING PACKING NITRONIC 50 STAINLESS STEEL VALVE PLUG AND CAGE Inches mm 440C STAINLESS STEEL VALVE PLUG AND CAGE AND 17 7 PH STAINLESS STEEL PACKING SPRING STAINLESS STEEL VALVE PLUG AND CAGE AND INCONEL X750 PACKING SPRING 1 4 3 8 1 2 3 4 6 4 9 5 12 7 10 1 10B7899X012 10B7899X022 10B7899X032 10B7899X042 10B7899X052 10B7899X...

Страница 11: ...128 PQC 11 Figure 8 Type 128 Actuator 29A0341 A DOC 29A0343 A DOC ...

Страница 12: ...y 68700 France Sao Paulo 05424 Brazil Singapore128461 Printed in U S A Fisher Controls International Inc 1988 1998 All Rights Reserved Fisher Fisher Rosemount and Managing The Process Better are marks owned by Fisher Controls International Inc or Fisher Rosemount Systems Inc All other marks are the property of their respective owners ...

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