Reduced Port - Series: 15
To 900°F with optional materials
Design Standard
The PDC “Reduced Port” series butterfly valve is available in sizes from 3″ thru 14″ in a combination of materials and optional features suitable for most mid-range differential pressures and service conditions.
Specifications
To 900°F with optional materials
Design Features
- Inboard bushings of graphited bronze for long life, non-freezing, low torque characteristics.
- Close tolerance machining for minimal leakage and dependable flow characteristics.
- Adjustable packing-Graphited TEFLON ® Braid. Valves can be repacked without removal from line.
- Rugged mounting pads drilled and tapped for ease of installing actuating equipment and accessories.
- Flatted, keywayed or hexed ends on shafts are available to facilitate factory or field mounting of all types of actuating equipment.
- Lightweight, solid ring, wafer design for ease of installation. Four holes to insure proper alignment without transfer of pipe stresses to the valve body.
Applications
- Blower Equipment
- Compressor Equipment
- Boiler Equipment
- Environmental Systems
- V.A.C
- Industrial Process Furnaces
- Oil Gas/Refining
- Power Generation/Co-Generation
- Water & Sewage
- Stationary Engines
- Chemical Equipment
- Mining Equipment
- Gas Recovery Systems
Standard Materials and Seat Construction
| Body: | Cast Iron |
| Disc: | Cast Iron |
| Shaft: | 416 Stainless Steel |
| Seat: | Swing-thru |
| Bushing: | Graphited Bronze |
| Packing: | Graphited Teflon Braid |
| Packing Nut: | Brass |
Optional Materials and Seat Construction
| Body: | High Temperature Iron, Carbon Steel, 316 Stainless Steel, 304 Stainless Steel |
| Disc: | High Temperature Iron, Carbon Steel, 316 Stainless Steel, 304 Stainless Steel |
| Shaft: | 316 Stainless Steel, 304 Stainless Steel, Incoloy, Monel |
| Seat: | Angle (3″-4″), Metal Step (3″-14″), Tadpole Step (8″-14″) |
| Bushing: | 316 Stainless Steel, 304 Stainless Steel, Glass Filled Teflon, Metcar, Macor |
| Packing: | High Temperature Braid, Pure Teflon Braid, Teflon V-Ring |
| Packing Nut: | 316 Stainless Steel |
- Body
- Disc
- Power Shaft
- Idle Shaft
- a. Bushing b. Bushing Extension
- Braided Packing
- Adjustable Packing Nut
- Shaft Retaining Pin
Chart or Graph
*Torque, Lb-In, Required for PDC Swing Thru Butterfly Valves with Disc in Closed Position for Temperatures up to 450° Fahrenheit
*Below torques only apply to normal clean service conditions.
| VALVE SIZE | PRESSURE DROP ACROSS DISC IN CLOSED POSITION, PSI | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 1 | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 125 | 150 | |
| 3 x 2.5 | 50 | 51 | 53 | 55 | 58 | 60 | 63 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 113 | 125 |
| 4 x 3 | 50 | 51 | 54 | 57 | 61 | 64 | 68 | 71 | 78 | 85 | 92 | 99 | 106 | 113 | 120 | 138 | 155 |
| 5 x 4 | 51 | 52 | 59 | 67 | 76 | 84 | 93 | 101 | 118 | 135 | 152 | 169 | 186 | 203 | 220 | 263 | – |
| 6 x 5 | 51 | 53 | 63 | 75 | 88 | 100 | 113 | 125 | 150 | 175 | 200 | 225 | 250 | 275 | 300 | – | – |
| 8 x 6 | 52 | 54 | 69 | 88 | 107 | 126 | 145 | 164 | 202 | 240 | 278 | 316 | 354 | – | – | – | – |
| 10 x 8 | 124 | 128 | 158 | 195 | 233 | 270 | 308 | 345 | 420 | 495 | 570 | 645 | 720 | 795 | – | – | – |
| VALVE SIZE | PRESSURE DROP ACROSS DISC IN CLOSED POSITION, PSI | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 1 | 3 | 5 | 8 | 10 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 | 70 | |
| 10 x 12 | 129 | 137 | 171 | 205 | 256 | 290 | 341 | 375 | 460 | 545 | 630 | 715 | 800 | 885 | 970 | 1140 | 1310 |
| 14 x 12 | 132 | 143 | 189 | 235 | 304 | 350 | 419 | 465 | 580 | 695 | 810 | 925 | 1040 | 1155 | 1270 | – | – |
Typical Dimensions: 3″ thru 14″
| Size (inch) | A | B | C | D | E | F | H | Max. ΔP | Approx. Wt. (Lb) |
|---|---|---|---|---|---|---|---|---|---|
| 3 x 2-1/2 | 2-1/2 | 4-3/8 | 5-7/8 | 1-1/2 | 5-1/4 | 4-1/4 | 1/2 | 150 | 12 |
| 4 x 3 | 3 | 4-7/8 | 6-3/8 | 1-1/2 | 6-1/4 | 4-1/4 | 1/2 | 150 | 15 |
| 5 x 4 | 4 | 5-3/8 | 6-7/8 | 1-1/2 | 7-3/8 | 4-1/4 | 1/2 | 125 | 20 |
| 6 x 5 | 5 | 5-7/8 | 7-3/8 | 1-1/2 | 8-1/2 | 4-1/4 | 1/2 | 100 | 27 |
| 8 x 6 | 6 | 7-3/4 | 9-5/8 | 1-7/8 | 10-3/4 | 5-1/8 | 3/4 | 80 | 60 |
| 10 x 8 | 8 | 8-3/4 | 10-5/8 | 1-7/8 | 13 | 5-1/8 | 3/4 | 90 | 65 |
| 12 x 10 | 10 | 9-1/2 | 11-5/8 | 1-7/8 | 15-1/4 | 5-1/8 | 3/4 | 70 | 80 |
| 14 x 12 | 12 | 10-1/2 | 12-1/8 | 1-7/8 | 16-3/8 | 5-1/8 | 3/4 | 50 | 86 |
* “G” Length and configuration of the shaft end will vary to accommodate specific actuators. Refer to the accessory section for typical flatted, keywayed, and hexed end configurations available.
MAX. ∆P is based on 0° disc position, using standard materials of construction at a maximum temperature of 450° Fahrenheit.
Consult factory for MAX. ∆P for elevated temperatures.
Cv Values for PDC Swing Thru Butterfly Valves
By definition, Cv is the flow coefficient of a control device or flow restriction. Cv is defined as the number of US gallons of 60°F water per minute which will flow through the given restriction with a one pound per square inch pressure drop.
Cv Values
(Flow in GPM of 60°F water at 1 psi pressure drop Specific Gravity=1)
| VALVE SIZE | Disc Angle, Degrees | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 3 x 2.5 | 4 | 8 | 20 | 34 | 56 | 84 | 126 | 178 | 194 |
| 4 x 3 | 6 | 14 | 30 | 51 | 85 | 132 | 202 | 279 | 370 |
| 5 x 4 | 13 | 28 | 54 | 98 | 159 | 257 | 391 | 550 | 747 |
| 6 x 5 | 21 | 43 | 88 | 158 | 265 | 429 | 636 | 913 | 1272 |
| 8 x 6 | 30 | 63 | 126 | 228 | 382 | 632 | 955 | 1370 | 1999 |
| 10 x 8 | 53 | 111 | 225 | 406 | 680 | 1125 | 1698 | 2591 | 3853 |
| 12 x 10 | 83 | 174 | 351 | 635 | 1063 | 1759 | 2655 | 4052 | 6361 |
| 14 x 12 | 120 | 252 | 506 | 914 | 1531 | 2533 | 3826 | 5835 | 9164 |
