Medium Duty - Series: 01

Size: 2" thru 14", 16" thru 24"
Operating Temperature: To 450°F with standard materials.
To 900°F with optional materials.

Design Standard

The PDC “Medium Duty” series butterfly valve is available in sizes from 2″ thru 24″ in a combination of materials and optional features suitable for most mid-range differential pressures and service conditions.

Specifications

Size Range:
2" thru 14", 16" thru 24"
Temperature:
To 450°F with standard materials.
To 900°F with optional materials.
Pressure Rating:
Varies with size. See Econotrol Series 09 Brochure
Shutoff Rating:
ANSI Class II
Body Style:
Wafer

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.
  • 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

2″ – 14″16″ – 24″
Body:Cast Iron Cast Iron
Disc:Cast IronDuctile Iron
Shaft:416 Stainless Steel416 Stainless Steel
Seat:Swing-thruSwing-thru
Bushing:Graphited BronzeBronze
Packing:Graphited Teflon BraidGraphited Teflon Braid
Packing Nut:BrassBrass

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 (2″- 24″), Metal Step (2″- 24″), Tadpole Step (6″- 24″)
Bushing:316 Stainless Steel, 304 Stainless Steel, Glass Filled Teflon, Metcar
Packing:High Temperature Braid, Pure Teflon Braid, Teflon V-Ring
Packing Nut:316 Stainless Steel

Medium Duty 2″ Through 14″ Valve size

  1. Body
  2. Disc
  3. Power Shaft
  4. Idle Shaft
  5. Bushing
  6. Braided Packing
  7. Packing Nut
  8. Shaft Retaining Pin

16″ – 24″ Valve size

  1. Valve Body
  2. Valve Disc
  3. Power End Shaft
  4. Idle End Shaft
  5. Inboard Bushing
  6. Braided Packing (can be maintenanced in line)
  7. Packing Nut
  8. Shaft Retaining Pin
  9. Pipe Plug (sealed)

Chart or Graph

*Torque, Lb-In/PSI, Required for PDC swing thru valves with disc in closed position for temperatures up to 450 degrees F

*Below Torques only apply to normal clean service conditions

VALVE SIZEPRESSURE DROP ACROSS DISC IN CLOSED POSITION, PSI
0.5151015202530405060708090100125150
25050525355565859626568717477808895
2.55051535558606365707580859095100113125
3505154576164687178859299108113120138155
451525967788493101118135152169188203220263
55153637588100113125150175200225250275300
652546988107126145164202240278316354
8124128158195233270308345420495570645720795
VALVE SIZEPRESSURE DROP ACROSS DISC IN CLOSED POSITION, PSI
0.51358101315202530354045506070
1012913717120525629034137546054563071580088597011401310
12132143189235304350419465580695810925104011551270
1413915723130541649060167586010451230
1622324533542556065078587511001325155017752000
18235270410550760900110012501600195023002650
VALVE SIZEPRESSURE DROP ACROSS DISC IN CLOSED POSITION, PSI
0.512457910121415171920222425
2024529038058065083010101100128014601550173019102000218023802450
22261322444688810105412981420166419082030227425182640
242803595188369951313163117902108242625852903

Typical Dimensions: 4″ thru 14″

SIZEABCDEFHMax ΔPApprox wt (Lb.)
223-7/85-3/81-1/23-7/84-1/4 1/2 1509
2-1/22-1/24-1/85-5/81-1/2 4-5/84-1/4 1/2 15010
334-3/85-7/81-1/2 5-1/84-1/4 1/2 15011
444-7/86-3/81-1/2 6-3/84-1/41/212512
555-3/86-7/81-1/2 7-1/24-1/41/210015
665-7/87-3/81-1/2 8-1/24-1/41/28017
887-3/49-5/81-7/810-3/45-1/83/49032
10108-3/410-5/8 1-7/8 135-1/83/47040
12129-3/411-5/8 1-7/8 15-1/45-1/83/45050
1413-1/810-1/212-1/8 1-7/8 16-3/85-1/83/43070

Typical Dimensions: 16″ thru 24″

Size (inch)ABCDEFHMax ΔPApprox wt (Lb.)
16212-3/414-1/22-3/818-1/45-1/8140122
1817-1/813-7/815-1/22-3/8 20-3/45-1/8130155
2019-1/814-7/816-1/22-3/8 22-3/45-1/8125192
2221-1/816-1/217-1/22-3/8 255-1/8120232
2423-1/817-1/418-1/22-3/8 275-1/8117276

* “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.

*Also Available in RPM Drilling in Most Sizes: Consult Factory

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 SIZEDisc Angle, Degress
102030405060708090
22511203449648390
2.54820345684126178194
3614305185132202279370
413285498159257391550747
52143881582654296369131272
6306312622838263295513701999
85311122540668011251169825913853
108317435163510631759265540526361
1212025250691415312533382658359164
141433026061096183530554584699210981
161914008051455243641186388983512266
18244513103218653123527981851260815273
203056401287232638966584102091572519612
223727811570283847538033124561918623929
249361882340156969626149262299028674