ProDia Diaphragm Valves are known for their benefits in corrosion

and abrasion resistance, offering features of leak tightness and low

cost maintenance in severe service applications.

The valves are based on simple operating principles and have

recently become more widely used by process engineers as a result

ofthe increased range of diaphragms and body lining materials. Weir

Type 'ST' Diaphragm Valves are extremely versatile in their

application because of the variety of body materials,linings, coatings

and grades of diaphragms available.

Straight through diaphragms incorporate the use of PTFE, offering

maximum chemical and temperature resistance.

ST Type Diaphragm Valves manual bonnet assemblies incorporate

position indication, as well as adjustable tamper-proof and over-

closure-protection.

Over-closure is the most common cause of diaphragm damage,

particularly in temperatures above 80°C (175°F).

Pneumatically, hydraulically and electrically operated

Straight through Type Diaphragm Valves are available for

the automatic control of process plants. The actuators can

be fitted with many forms of positioners, micro and

proximity switches. Numerous other options offer unique

cost effective process control of corrosive services.

P R O D I A D i a p h r a g m v a l v e s T y p e S T

2/4 PRODIAST

* Halar TM is the registered mark of Ausimont UK Limited. * Rilsan TM is the registered trademark of ATO Chemical Products * Is the registered trademark of E.I. du Pont de Nemours and Company

unlined

Email

ETFE lined

PFA coated

Rubber lined

Pvc coated

Advantages

In-line maintenance – all topworks (diaphragm and operator) can be replaced without

disassembling the body from the pipeline.

Regular diaphragm inspection, and replacement when necessary, will increase valve life

Bonnet isolation – all bonnet components are isolated from the service by means of the

diaphragm

No packings/gaskets are required, thus eliminating a common leak path found in other

valves types Design flexibility – wide range of diaphragms, linings and operators

offering scope to maximize valve life.

Over-closure protection – lowers cost of owning ProDia diaphragm valves by reducing

the possibility of over-clouser, which decreases diaphragm and valve body life

Diaphragm valves are self-draining and self-cleaning

Body Connection DN

GG 25 Screwed ends 25-80

Flange 25-300

GGG 40.3 Screwed ends 25-80

flange 25-300

GS-C25 Screwed ends 25-80

Flange 25-300

1.4408. Welded ends 25-100

Screwed ends 25-80

Flanges 25-300

Bronze Screwed ends 25-50

Flange 25-150

Soft rubber Flange 25-300

Hard rubber Flange 25-300

Butyl Flange 25-300

Neoprene Flange 25-300

Hypalon Flange 25-300

Email Flange 25-200

ECTFE Flange 25-200

ETFE Flange 25-200

PVDF Flange 25-200

NYLON 11 Flange 25-200

PRODIAST 3/4

Max allowed pressure at Temperature between -10°C to 50°C (14° to 122°F) *

DN (mm) INCH BAR PSI

25 -100 1-4 10 145

125 -150 5-6 6 87

200 -300 8-12 3,5 50

* higher Temperature lower the physical properties of the diaphragm and causes a decrease of the pressure.

Chart for ST Diaphragm and ST body

DIMENSION 15 20 25 32 40 50 65 80 100 125 150 200 250 300

BS 5156

UNLINED A 127 159 190 216 254 305 356 406 521 635 749

B 150 150 194 270 270 300 420 420 453 660 660

Wkg 3,7 5,9 9,3 13,5 21,5 33 50,5 65 130 250 330

A

133 165 196 223 261 313 364 415 530 645 759

Rubber lined B

155 154,5 198,5 276 276 307 429 429 462 660 660

DIN 3202/F1

UNLINED A 160 200 230 290 310 350 400 480 600 730 850

B 150 150 194 270 270 300 420 420 453 660 660

Wkg 4,4 6,3 9,8 15,7 26,6 34 51,5 69 136 290 385

A

160 200 230 290 310 350 400 480 600 730 850

Rubber lined B

155 154,5 198,5 276 276 307 429 429 462 660 660

MSS SP-88

UNLINED A 140 165 190 216 254 317 - 406 521

B 150 150 194 270 270 300 - 420 453

Wkg 4,0 6,1 9,3 13,5 21,5 52 - 65 130

A 146 171,5 197 223 261 324 - 415 530

GUMMIERT B 155 154,5 198,5 276 276 307 - 429 462

VERSCHRAUBUNG

UNLINED A 108 167

B 150 194

Wkg 1,5 5,1

For rubber lined valves please add to face to face (except Standard DIN)

6 mm (1/4 ") – for DN 25 - DN 80 (1"-3")

8 mm (5/16 ") – for DN 100 - DN 200 (4"-8") 10 mm (3/8 ") – for DN 250 - DN 300 (10"-12")

A

Dimension / Weight

4/4

B

Handwheel Pin

Handwheel

Stem

Compressor Pin

Thrust disc Bonnet

Compressor

Bolts / Nuts

Diaphragm Body / s. Spec

Spring steel

Cast iron

Stainless steel

Spring steel

Polyacetal Cast Iron

Cast Iron

Steel 8.8

s. Spec

s. Spec

ProDiaST

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Quelle der verwendeten Bilder im Prospekt: www.Fotolia.de Urheber: Eray Haciosmanoglu, Orlando Florin Rosu , erikdegraaf , christian42 , Dan Race , Paul Stock , Thaut Images

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