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CVS Controls 128PQC Series Instruction Manual Download Page 11

 

 

11 

PRODUCT BULLETIN 

– CVS 128PQC 

VALVE 

SIZE

 

PORT 

DIAMETER

 

MAXIMUM 

TRAVEL

 

 

 

 

QUICK OPENING 

 

 

 

 

 

 

 

Valve Opening

— 

Percent of Total Travel

 

 

 

 

mm 

 

Inches 

 

mm

 

Inches

 

10

 

30

 

70

 

100

 

10

 

30

 

70

 

100

 

10

 

30

 

70

 

100

 

100

 

 

K

v

 

 

C

v

 

 

X

T

 

 

F

L

 

 

 

 

Globe Valve

—Flow Up 

 

 

 

 

1 

 

6.35 
9.53 
12.7 

 

1/4 
3/8 
1/2 

9.5 
9.5 
9.5 

3/8 
3/8 
3/8 

.566 
.828 
1.02 

 

1.14 
2.02 
2.71 

 

1.38 
2.60 
3.88 

 

1.38 
2.60 
3.88 

 

.654 
.957 
1.18 

 

1.32 
2.33 
3.13 

 

1.60 
3.01 
4.49 

 

1.60 
3.01 
4.49 

 

.539 
.578 
.614 

 

.694 
.699 
.677 

 

.539 
.746 
.803 

 

.539 
.746 
.824 

 

.77 
.82 
.91 

 

 

 

 

 

 

 

Globe Valve

—Flow Down 

 

 

 

 

1 

 

6.35 
9.53 
12.7 

 

1/4 
3/8 
1/2 

9.5 
9.5 
9.5 

3/8 
3/8 
3/8 

.616 

.91 

1.12 

 

1.28 
2.23 
2.80 

 

1.38 
2.71 
3.58 

 

1.38 
2.71 
3.65 

 

.712 
1.05 
1.30 

 

1.48 
2.58 
3.24 

 

1.60 
3.13 
4.14 

 

1.60 
3.13 
4.22 

 

.575 
.559 
.512 

 

.601 
.613 
.607 

 

.567 
.717 
.899 

 

.567 
.717 
.887 

 

.82 
.87 
.91 

 

 

 

 

 

 

 

Angle Valve

—Flow Up 

 

 

 

 

1 

 

6.35 
9.53 
12.7 

 

1/4 
3/8 
1/2 

9.5 
9.5 
9.5 

3/8 
3/8 
3/8 

.699 
.943 
1.08 

 

1.22 
2.14 
2.77 

 

1.38 
2.98 
4.61 

 

1.38 
2.98 
4.84 

 

.808 
1.09 
1.25 

 

1.41 
2.47 
3.20 

 

1.60 
3.44 
5.33

 

1.60 
3.44 
5.59 

 

.398 
.433 
.510 

 

.706 
.636 
.660 

 

.553 
.605 
.674 

 

.553 
.605 
.663 

 

.77 
.76 
.90 

 

 

 

 

 

 

 

Angle Valve

—Flow Down 

 

 

 

 

1 

 

6.35 
9.53 
12.7 

 

1/4 
3/8 
1/2 

9.5 
9.5 
9.5 

3/8 
3/8 
3/8 

.676 
.798 
1.18 

 

1.36 
2.33 
3.10 

 

1.46 
3.16 
4.40 

 

1.46 
3.16 
4.40 

 

.782 
.923 
1.36 

 

1.57 
2.69 
3.58 

 

1.69 
3.65 
5.09 

 

1.69 
3.65 
5.09 

 

.397 
.515 
.414 

 

.520 
.495 
.469 

 

.500 
.507 
.602 

 

.500 
.507 
.602 

 

.77 
.77 
.78 

 

 

Flow Coefficients 

Dimensions - Inches 

 

Summary of Contents for 128PQC Series

Page 1: ...an be reversed in the field with minimum disruption and no additional parts Instruction Manual Figure 1 CVS Type 128PQC Control Valve CVS Type 128PQC is a 1 inch Control Valve standard configuration i...

Page 2: ...fications Metal Seat ASME Class IV ASME FCI 70 2 1998 0 01 percent of maximum valve capacity using air at a pressure drop of 50 psi 3 4 bar differential at 50o F to 125o F 10o C to 52o C Soft Seat ASM...

Page 3: ...this valve allows for installation in any orientation with the standard method being with the actuator above the body Standard orientation is best when an angle body or angle configuration has been s...

Page 4: ...9 5 520 36 1340 92 1340 92 3120 215 1 2 12 7 220 15 690 47 700 48 1720 118 Close Valve 1 4 6 4 940 65 1860 128 1370 94 2920 201 3 8 9 5 1130 78 2450 169 1540 106 3300 227 1 2 12 7 1330 92 2920 201 171...

Page 5: ...the O ring retainer Key 18 and the diaphragm casing O ring Key 31 are sealed against the diaphragm casing 7 1 Ensuring proper positioning of the O rings will prevent them from being cut when other par...

Page 6: ...nuts tightening in an even crisscross pattern to avoid crushing the diaphragm Tighten to 15 foot pounds 20 N m 9 Reconnect the input signal tubing to the actuator connection of the appropriate diaphr...

Page 7: ...n from previous direction move the vent Key 3 to the 1 4 inch NPT actuator connection of the lower diaphragm casing for fail open action or upper diaphragm casing for fail close action 12 For fail clo...

Page 8: ...V Ring Packing Nitronic 50 SST Valve Plug and Cage and Inconel X750 Packing Spring In mm CVS Type 128PQC 17 7PH SST Packing Spring CVS Type 128 PQC 1 4 6 5 CVS15A2611X012 CVS15A2611X042 3 8 9 5 CVS15...

Page 9: ...ical CVS Series 128PQC Control Valve Assembly CVS Type 128PQC Control Valve Fail Closed with Cage Style Metal Seat and Single TFE V Ring Packing Fail Open Actuator Detail CVS Design 128PQC Cageless So...

Page 10: ...CVS14A7157X022 Austenitic SST w Tungsten Carbide Seating Surface CVS Type 128PQC 1 4 6 4 mm CVS15A6800X012 3 8 9 5 mm CVS15A6801X012 24 Pipe Plug Steel CVS1A794728992 25 Valve Plug Metal Seat CVS Typ...

Page 11: ...3 8 3 8 616 91 1 12 1 28 2 23 2 80 1 38 2 71 3 58 1 38 2 71 3 65 712 1 05 1 30 1 48 2 58 3 24 1 60 3 13 4 14 1 60 3 13 4 22 575 559 512 601 613 607 567 717 899 567 717 887 82 87 91 Angle Valve Flow Up...

Page 12: ...ation included in this publication is presented for informational purposes only CVS Controls Ltd reserves the right to modify or change and improve design process and specifications without written no...

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