Diaphragm Valve    Ref.# 094151800
True Union
(1/2"-2"SOC./THD./FLANGED)

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DESIGN ADVANTAGES

  • Solid thermoplastic body and bonnet for best overall corrosion resistance.
  • Large diameter molded in stainless steel diaphragm stud for long life service.
  • Fully lubricated brass or cast iron stem and sleeve. Sizes 3" and larger have bonnet grease fitting for ease of in service lubrication.
  • Extra heavy EPDM diaphragm or optional PTFE diaphragm fully backed by EPDM, for long service life under the most severe conditions.
  • Unique concave/convex PTFE/ EPDM diaphragm design insures PTFE barrier returns to full open position.
  • Standard, adjustable full close position over travel stop to eliminate premature diaphragm failure due to overtightening.
  • Full stroke, fully protected open/close position indication.
  • Stainless steel or plastic encapsulated external hardware.
  • Longer service life and higher Cv valves than rubber lined valves.
  • High pressure, temperature and vacuum service rated, suitable for most applications.
  • Can be used in lined, metal FRP or thermoplastic piping systems.
  • Flanged application valves designed to fit between ANSI B16.5 Class 150 flanges.

*

Valves 1/2" - 2 1/2" can be used in vacuum service. Valves 3" and larger must be ordered special from the factory for use in vacuum service. Consult factory for more information regarding this option.

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Materials of Construction

Item

Parts

Pcs

Materials

1

Body

1

PVC, PP, PVDF, CPVC

2

Bonnet

1

PVC, PP, PVDF, CPVC

3

Compressor

1

1/2"-1" PPG+Nylon
1/2"-10" Cast Iron

4

Hand Wheel

1

PP

5

Sleeve

1

1/2"-2" Brass
21/2"-10" Cast Iron

6

Stem

1

1/2"-2" Brass
21/2"-10" SS 41

7

Diaphragm

1

EPDM, HYPALON TEFLON?/small>

8

Cap

1

1/2"-2" Brass
21/2"-10" PVC,PP

9

Compressor Pin

1

SUS-304

10

Name Plate

1

PVC

11

Grease Nipple

1

BRASS

12

Stud Bolt & Nut

 

SS41, SUS304

13

Inserted Nut

 

BRASS

14

Bolt Nut & Washer

 

SS41, SUS304

15

Thrust Bearing

1

Standardized 3" - 10" Used Only

16

Stopper

1

SS-41, BRASS, SUS304

17

Set Nut

1

SS-41, BRASS, SUS304

18

Gauge Cover

1

POLYCARBONATE

19

Sheet Gasket

1

EPDM

20

Sheet Ring

1

SS-41, BRASS,SUS304

21

Spring Washer

1

SS-41, SUS304

VITON?is a trademark of  Dupont Dow Elastomers
TEFLON?is a trademark of E.l. DuPont

FLANGED BODY TYPE 1/2" - 10" DIAPHRAGM VALVES

DESIGN SPECIFICATION

 

Thermoplastic Diaphragm Valves  1/2" - 10" Flg.; shall be molded of solid thermoplastic materials for body and bonnet. Body is of the weir configuration exhibiting large flow area and good flow control capability. Body is designed to fit between ANSI B16.5 class 150 flanges. Stem and sleeve shall be brass or cast iron, fully lubricated . Sizes 3" and larger employs a bonnet grease fitting for ease of lubrication. All valves shall have an adjustable overtravel stop in the close position to prevent overtravel and premature diaphragm failure. Full stroke position indication is enclosed in a clear protective cover. All external fasteners shall be either encapsulated in plastic or of stainless steel materials. Materials of construction shall be: (select as required for service)

BODY
PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

BONNET
PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

STEM/SLEEVE
Brass, 1/2" - 2",
C.I., 2 1/2" - 10"

DIAPHRAGM
EPDM, Ethylene Propylene Diene Monomer
Fluorocarbon, Viton (E.I. Dupont) for vacuum service only
Fluorel (3M Corp.)
PTFE/EPDM, Teflon (E.I. Dupont)

DIAPHRAGM INSERT STUD
Stainless Steel, Large Diameter

POSITIVE INDICATOR COVER
PC, Polycarbonate, ASTM - D-2848

HANDWHEEL
ABS, ASTM D-1788

  Not recommended for compressed air or  gas service.

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