Material

Body, Cover

cast iron, Carbon Steel, Stainless steel

Secondary disc, Secondary seat, Diaphragm, Main disc, Main seat, Piston

Stainless steel

Secondary spring, Main spring

Chrome vanadium steel

Compression spring

Silicon manganese steel

Piston ring

Alloy cast iron

Nominal diameter
DN(mm)

Dimensions (mm)

L

H1

H 2

1.6

20

160

89

312

25

180

101

315

  32

  200

  107

320

40

220

113

325

50

250

120

335

65

260

125

340

80

310

140

360

100

350

150

390

125

400

190

415

150

450

205

440

200

500

220

475

250

600

270

545

300

800

335

575

350

850

390

650

400

900

430

705

2.5

25

200

101

315

32

200

107

320

40

220

113

325

  50

  250

  120

335

65

260

125

340

80

310

140

360

100

350

150

390

  125

  400

  190

  425

150

450

210

445

200

500

245

485

250

600

270

545

300

800

335

575

350

850

390

650

400

900

430

710

4.0

25

200

101

315

32

220

107

320

40

240

113

325

50

270

120

335

65

280

140

365

80

330

150

385

100

380

150

385

125

450

190

425

150

500

210

445

200

560

245

485

6.3
(6.4)

25

200

110

370

32

220

125

380

40

240

130

395

50

270

135

405

65

300

145

410

80

330

170

445

100

380

175

455

125

450

245

504

150

500

280

555

200

560

310

581