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manufactured in the usa

Hills-McCanna® Unlined Metal Diaphragm Valves

Hills-McCanna® Unlined Metal Diaphragm Valves, Unlined are rugged, durable, and designed to handle a wide range of fluids and gases including highly corrosive toxic chemicals and abrasive slurries. Available in a wide variety of materials and options, in sizes ½” to 12”, with a temperature range of (-)60°F to (+) 350°F at pressures to 200 psig.

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unlined metal diaphragm valve

Product Features & Benefits

  • NO PACKING OR SEALS TO ADJUST
  • NO VALVE SEATS TO REPLACE
  • IN-LINE REPAIRABILITY
  • DIFFERENT MATERIAL OPTIONS TO CHOOSE FROM:
    • Unlined metal diaphragm valves are available in:
    • Ductile Iron
    • Carbon Steel
    • 316 Stainless
    • Alloy 20
    • Other Materials (Contact Customer Service)
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bubble-tight unlined metal diaphragm valves
  • BUBBLE-TIGHT SHUTOFF: On pressure or vacuum applications, zero leakage in accordance with MSS SP-88. 
unlined metal diaphragm valve throttling
  • THROTTLING: Ideal for both on/off and modulation applications. Streamline flow path is cavit free for excellent control capabilities. 
streamline flow unlined metal diaphragm valves
  • STREAMLINE FLOW/BI-DIRECTIONAL: Smooth contoured body design has no cavities or pockets for smooth flow and contamination-free performance. Hills-McCanna valves can be oriented to facilitate self-draining.

Technical Details

Size Range

Valve Sizing Constants (CV), Metallic Unlined: 1/2" to 12"

    Percent of Stem Travel
Valve Size Turns* 10 20 30 40 50 60 70 80 90 100
0.5 3 0.8 1.6 2.4 3.3 4.4 5.3 6 6.6 6.9 7
0.75 3-3/4 1.5 3 4.2 6.5 8.2 9.7 11 12 12.8 13
1 4-1/2 2.5 6 9.5 13 16.5 19 21.5 23 24 24
1.25 4-3/4 4.5 8.5 14 18 22.5 27 29.5 31.5 32.5 33
1.5 5-3/4 9 18.5 27 35 42 47 51 53.5 55 65
2 7-1/4 16 30 43 53 62 69 74 78 80 81
2.5 7-1/4 23 45 64 81 94 105 113 119 123 125
3 7-1/2 35 69 104 134 160 180 194 202 207 209
4 10-3/4 78 148 208 259 296 321 338 350 357 360
6 15-3/4 165 300 425 525 610 680 735 775 795 805
8 18 210 425 635 840 1025 1180 1290 1360 1390 1400
10 20-1/4 300 600 865 1120 1370 1590 1770 1890 1950 1970
12 22-3/4 430 870 1290 1650 1960 2220 2400 2520 2580 2600
  * Approximate turns to close

Weight of Standard Hills-McCanna Diaphragm Valves

Threaded End, Butt Weld End, Socket End (approximate - in pounds)
Size 1/2" 3/4" 1" 1-1/2" 2" 2-1/2"
Solid Plastic 1 2 2.75 6 10.5 ---
All Others 2 2.5 4 9.5 15 27
Flanged End (approximate - in pounds)
Size 1/2" 3/4" 1" 1-1/2" 2" 2-1/2" 3" 4" 6" 8" 10" 12"
PVC 1.5 2.25 3.5 7 12.75 --- --- --- --- --- --- ---
All Others 4 5 7 13 22 36 49 97 170 360 600 885

Pressure/Temperature Recommendations: (-)60°F to (+)350° F at pressures to 200 psig

pressure temperature curve

Valve Options

Please review Diaphragm Valves Brochure for full details.

Bonnet (Non-Wetted Options)

  • INDICATING (STANDARD) Valve position can be determined at a glance.
  • INDICATING WITH TRAVEL STOP In addition to indicating position, the closing stroke can be limited.
  • NON-INDICATING Used when space limitations are a factor.

ALSO AVAILABLE:

  • Sealed Bonnet
  • Chainwheel
  • Extended Stem
  • Actuated

End Connection Options

  • THREADED
    • ½” to 3”
    • ½” to 2: Solid Plastic
  • SOCKET WELD
    • ½” to 3”
    • ½” to 2” Solid Plastic
  • FLANGED
    • ½” to 12”
    • ½” to 2” Solid Plastic
  • BUTT WELD
    • ½” to 4”
    • Metal Only

Diaphragm Options

  • McCannaplast™ EPDM Back
  • McCannaplast™ EPDM White
  • Neoprene Black
  • Neobrene White
  • PTFE / McCannaplast™
  • Natural Rubber
  • Viton
  • Hypalon

Exclusive Sealing Bead

The sealing bead extends around and between bolt holes and across the setting area. This exclusive design localizes bolting and closing forces, assuring a positive seal with minimum bolting torque, and stem thrust.

Automation

Hills-McCanna actuators are available for on / off applications or when more complex flow control is required. Actuators can be provided with positioners, limit switches, speed controls, filter regulators, and a variety of other accessories and options to meet sophisticated flow control and fine throttling requirements.

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need help choosing a material?

View Our Chemical Resistance Guide

This resource is intended as a guideline to be used with all available information to determine suitability of material selection. We suggest thorough research which should include known applications when determining material. The information contained herein is provided only as a guide for the use of ANDRONACO INDUSTRIES products.

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