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128-PQC

8

Figure 5. Replacement Packing and Trim Assemblies for Metal-Seated Construction

10B7899-C/DOC

Key

Description

Part Number

Parts List

Travel Indicator Assembly

35A1588X0A2

1

Valve Body, 1-inch NPT

24A8802X012

2*

Cage

440C stainless steel, heat-treated

(1,2)

1/4 inch port

14A8823X022

3/8 inch port

14A8805X022

1/2 inch port

14A7157X022

Nitronic 50

(1)

 stainless steel

1/4 inch port

14A8823X032

3/8 inch port

14A8805X032

1/2 inch port

14A7157X032

Carbide seating surface

(1,2)

1/4 inch port

15A6800X012

3/8 inch 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

Austenitic stainless steel/polyethylene

15A3197X012

3B* Stem, 316 stainless steel

(2)

w/o handjack

14A8806X012

w/handjack

26A1765X012

*Recommended spare parts

1. May also be ordered from the Replacement Packing and Trim Assembly Part
Numbers table.
2. May also be ordered as part of the cage/plug/stem assembly (key 52).

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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