GS51 HW

The G.S.51 diaphragm valve shown here is of the “conveyed flow” type with a loss of pressure below that of standard seat valves; according to the various operating conditions (which the user should kindly specify) the valve body can be cast iron, vulcanite and cast iron, glazed cast iron, light alloy, etc.; the diaphragm, in any case, consists of the material suitable for the specific service required from the valve. The head, complete with all control parts, consists of standard metals since the diaphragm protects it against any attack from fluids which the valve is supposed to control and check.?
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The diaphragm is controlled in the opening and closing positions; as a result the valve can operate even under vacuum. It is recommended, on the other hand, never to exceed certain values of inner pressure also in connection with the valve size; users should specify on the enquiries, for this type of valves, the peak figures of pressure and temperature of the fluid with which the valves are in contact.?
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The valves are available for flow diameters ranging from 15 to 350 mm; these valves are used extensively in chemical industries and chiefly in water’s treatment.

DETAILS

1

CONTROL WHEEL

2

LEAD SCREW

3

COVER

4

HEXAGON NUT

5

WASHER

6

PLUG

7

STUD BOLT

8

DIAPHRAGM

9

SOCKET

10

GASKET

11

BRONZE NUT

12

VALVE BODY

13

CLAMPING SCREW FOR BUSHING

PRESSURE DETAILS UNI_1284

DN

P.N.

HYDRAULIC TEST Kg/cm2

WORKING PRESSURE Kg/cm2

OPEN

CLOSED

15

14

15

14

13

20

14

15

14

13

25

14

15

14

13

30

13

15

13

12

40

12,5

15

12,5

11,5

50

12,5

15

12,5

11,5

60

11

15

11

10

75

10,5

15

10,5

9,5

100

10,5

15

10,5

9,5

125

9

13

9

8

150

8,7

13

8,7

7,7

200

7

13

7

6

250

6

8

6

6

300

6

8

6

6




DIMENSIONS C.I. UNLINED

Ø

B

C

G(UNI)

G(ASA)

15

87,5

108

95

90

20

112,5

117

105

98

25

117,5

127

115

108

30

135

146

140

118

40

170

159

150

127

50

187,5

190

165

152

60

232,5

217

185

178

75

260

254

200

190

100

315

305

220

229

125

400

356

250

254

150

442,5

406

285

280

200

585

520

340

343

250

655

635

395

406

300

718

749

445

483




DIMENSIONS C.I. EBONITE LINED

Ø

B

C

G(UNI)

G(ASA)

15

92,5

114

95

90

20

117,5

123

105

98

25

122,5

133

115

108

30

140

152

140

118

40

175

165

150

127

50

192,5

196

165

152

60

237,5

227

185

178

75

265

260

200

190

100

320

313

220

229

125

405

364

250

254

150

447,5

414

285

280

200

590

530

340

343

250

660

645

395

406

300

723

759

445

483




WEIGHT KG

C.I. UNLINED

C.I. EBONITE LINED

2,300

2,400

3,800

3,900

4,000

4,100

6,600

6,700

8,000

8,300

12,000

12,400

17,000

17,600

23,000

24,000

36,500

98,000

56,000

55,700

76,500

76,200

144,000

142,000

225,000

226,000

330,000

350,000

DETAILS

1

CONTROL WHEEL

2

LEAD SCREW

3

COVER

4

HEXAGON NUT

5

WASHER

6

PLUG

7

STUD BOLT

8

DIAPHRAGM

9

SOCKET

10

GASKET

11

BRONZE NUT

12

VALVE BODY

13

CLAMPING SCREW FOR BUSHING