1. Catalogs
  2. Mival
  3. Bellows valve – Item 347
video corpo

Bellows valve – Item 347

Bellows valve – Item 347

Bellows valve – Item 347

Product catalog summary
Components and Materials:
  • Body: GX5 CrNiMo 19-11-2
  • Yoke: GX5 CrNiMo 19-11-2
  • Disc: Stainless Steel 1.4401
  • Stem: Stainless Steel 1.4401
  • Bellows: Stainless Steel 1.4541
  • Antifriction Disk: Stainless Steel 1.4401
  • Gaskets: Graphite + Stainless Steel
  • Packing: Graphite
  • Handwheel: Pressed Steel
  • Studs and Nuts: Stainless Steel
Features:
  • TA-Luft Approved
  • Lubricator included
  • Backseat for safety
  • Double anti-friction bearings
  • Rotating disc
  • Opening index with anti-rotation function
  • Integral seat
Dimensions and Performance:
DN (mm)D (mm)L (mm)H (mm)V (mm)Weight (Kg)Kv (m3/h)
15951302351254.74.8
201051502351255.57.6
251151602451256.812.2
321401802451258.517.5
4015020027515011.327.8
5016523027515013.744.3
6518529037520026.581
8020031037520030.5115
10023535041025044.5184
12527040046030064272
15030048052035099383
200375600635400182691
250450730785500296.51086
Temperature and Pressure Ratings:
  • Temperature Range: -10°C to 400°C
  • Pressure Ratings vary with temperature, starting at 40 bar at -10°C and decreasing to 27.4 bar at 400°C
Flow Coefficients (Kv) at Different Openings:
  • 20% Opening: Ranges from 0.34 to 328.6 m3/h depending on DN
  • 40% Opening: Ranges from 1.03 to 576.2 m3/h depending on DN
  • 60% Opening: Ranges from 2.26 to 722.8 m3/h depending on DN
  • 80% Opening: Ranges from 3.4 to 807 m3/h depending on DN
  • 100% Opening: Ranges from 4.36 to 925.6 m3/h depending on DN
See more

Catalog excerpts

Bellows valve – Item 347-1

Caratteristiche principali di serie Main standard features I Limitatore di alzata (fornibile a richiesta gratuitamente) Rise limiter (available on request) Stop screw I Doppia ralla antifrizione Double anti-friction bearings Indicatore di apertura con funzione antirotazione Opening index with anti-rotatinon function Controtenuta di sicurezza ricavata sullo stelo Backseat Otturatore rotante Rotating disc Sede integrale Integral seat Possibili campi di impiego Application Impianti di trasmissione calore, centrali termiche, caldaie e serbatoi, impianti di teleriscaldamento, applicazioni con olio diatermico, industria chimica, industria ospedaliera, ecc. Heat transfer systems, thermal power stations, industrial boilers and tanks, distn'ct heating plants, diathermic oil installations, chemical industry, hospitals, etc.. Acqua calda e/o surriscaldata, vapore, aria, fluidi diatermici, fluidi corrosivi in genere, ecc. Hot water and/or overheated water, steam, air, diathermic fluids, corrosive fluids, etc... Materiali Materials Components Body Yoke Disc Stem Bellows Antifriction disk Gaskets Packing Handwheel Studs Nuts Material GX5 CrNiMo 19-11-2 GX5 CrNiMo 19-11-2 St. Steel 1.4401 St. Steel 1.4401 St. Steel 1.4541 St. Steel 1.4401 Graphite + St. Steel Graphite Pressed steel Stainless steel Stainless steel

 Open the catalog to page 1
Bellows valve – Item 347-2

Dimensioni Sizes KV alia percentuale di alzata figura 347/R Condizioni di esercizio/ Working conditions E’ necessario I’uso dell’otturatore equilibrato quando la pressione di esercizio supera i seguenti valori It is necessary to use the balanced disc when the working pressure is over the following values N0TA: Utilizzando una valvola con otturatore equilibrato e indispensabile installaria al contrario, cioe con la pressione sopra I'otturatore NOTE: Using a valve with balanced disc is it essential to install it in reverse way, that is with the pressure on the disc Varianti costruttive Manufacturing...

 Open the catalog to page 2
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.