Flanged End - Series: 39

Size: 4" thru 14" for 125/150 lb. Flanging
Operating Temperature: To 450°F with standard materials
Maximum Containment: 25 psi

Design Standard

The PDC “Flanged” series butterfly valve is available in sizes from 4″ thru 14″ in a combination of materials and optional features suitable for most mid-range differential pressures and service conditions.

Specifications

Size Range:
4" thru 14" for 125/150 lb. Flanging
Temperature:
To 450°F with standard materials
Pressure Rating:
25 PSI (1 Bar) containment
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.
  • Flatted, keywayed or hexed ends on shafts are available to facilitate factory or field mounting of all types of actuating equipment.
  • Lightweight, full faced flange designed for ease of installation. The full flanged drilling will allow for dead end flange connection.
  • Contoured bore improves flow characteristics.

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:Ductile 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:Carbon Steel, 316 Stainless Steel, 304 Stainless Steel
Shaft:316 Stainless Steel, 304 Stainless Steel, Incoloy, Monel
Seat:Angle
Bushing:316 Stainless Steel, 304 Stainless Steel, Glass Filled Teflon, Metcar
Packing:Pure Teflon Braid, Teflon V-Ring
Packing Nut:316 Stainless Steel
  1. Body
  2. Disc
  3. Power Shaft
  4. Idle Shaft
  5. Bushing
  6. Braided Packing
  7. Packing Nut
  8. Shaft Retaining Pin

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
0.51234568101214161820222425
45152535557596064677074778184879193
551535558606365707580859095100105110113
652545861656973808896103111118126134141145
8124128135143150158165180195210225240255270285300308
10129137154171188205222256290324358392426460494528545
12132143166189212235258304350396442488534580626672695
1413915719423126830534241649056463871278686093410081045

Typical Dimensions: 4″ thru 14″

SIZEABCDEFHJKLMMax ΔPApprox wt (Lb.)
444-1/26-3/8594-1/41/26-3/67-1/283/42535
5556-7/85104-1/41/27-1/28-1/287/82541
665-1/27-3/85114-1/41/28-1/29-1/287/82551
887-3/49-5/85-1/213-1/25-1/83/410-5/811-3/487/82572
10108-3/410-5/85-1/2165-1/83/412-3/414-1/41212591
12129-3/411-5/85-1/2195-1/83/4151712125120
1413-1/810-1/212-1/85-1/2215-1/83/416-1/418-3/4121-1/825140

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
413285498159257391550747
52143881582654296369131272
6306312622838263295513701999
8531112254066801125169825913853
108317435163510631758265540526361
1212025250691515312533382658359164
141433026061096183530354584699210981