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Fig. 4925 - Butterfly Valve Fully Lugged

Verified by manufacturer 11 days ago

DN50: Fig.4925

Hattersley Variant:

A fully-lugged, lever (Fig. 4925) or gearbox (Fig. 4925G) operated butterfly valve.

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Application

Suitable for Medium: Group 2 liquids.

Description

A fully-lugged, lever (Fig. 4925) or gearbox (Fig. 4925G) operated butterfly valve.


Features and benefits:

  • Robust, ductile iron valve bodies for long service life.
  • Stainless steel disc for improved strength and a wide range of applications.
  • Suitable for wide temperature range (DN50–300 - -10°C to 110°C).
  • Fully lugged for secure installation.
  • Rated PN25 for higher pressure applications.
  • Lever (4925) and Gearbox (4925G) options available.
  • Extended size range for application requirements.

General information

Color

Blue

Guidance for specification option:

Body, shaft covering, lever and handwheel.

Yellow

Silver

Guidance for specification option:

Stainless steel shaft and disk.

Black

Guidance for specification option:

NBR O-ring.

Material

Cast iron

Guidance for specification option:

Gearbox.

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Pr_65_54_95_08 Butterfly valvesPrimary
Pr_65_54_33_35 Gas butterfly valves

Specification data - Butterfly valves

Standard

To BS EN 593: 2009, BS EN 558, ISO 5211-2001 and BS EN 1092-2.

DN rating

DN50.

Manufacturer guidance

Nominal.

PN rating

Temperature: -10 to +120°C: 25 bar.

Manufacturer guidance

Test and inspection standard: BS EN 12266-1.

Working conditions

-

Maximum working pressure

Above 16 bar.

Materials

-

Body

Ductile iron.

Guidance for specification option:

  • DI (EN-GJS-400-15) to ASTM A536 65-45-12: DN50 to DN300.
  • To EN-GJS-450-10: DN350 to DN600.

Shaft

Stainless steel type 431.

Guidance for specification option:

  • DN50 to DN300.
  • To ASTM A276 431.

Manufacturer guidance

  • Pin: Stainless steel type 431 to ASTM A276 431 (DN50 to DN300).
  • Pin: Stainless steel type 630 to ASTM A564 630 (DN350 to DN600).
  • Top cap and bolt: Carbon steel to ASTM A194 Grade 2H.

Disc

Stainless steel type 304.

Guidance for specification option:

To ASTM A351 CF8.

Seat

Ethylene propylene diene monomer (EPDM).

Guidance for specification option:

  • O-ring: NBR.
  • Short and long bushing: Aluminium bronze to ASTM B148-952A.

Operation

-

Manual

Lever.

Guidance for specification option:

Fig. 4925: Malleable iron to ASTM Grade 32510.

Dimensions

138 x 65 x 43 x 125 x 32 x 216 mm.

Guidance for specification option:

a° = 45°.

Manufacturer guidance

  • Lever: Nominal A x B x C x ØD x H x L.
  • Geared: Nominal A x B x C x ØD x ØDD x L1 x L2.

Flow capacity

91 Kv.

Thread size

4 x M16.

Manufacturer guidance

Number x thread size.

Sustainability data

Material

Cast iron

Guidance for specification option:

Gearbox.

Recyclability

Recycle locally

Expected Life

20 year

Literature

CPD Leflet

CPD Leflet

General Valves Catalogue

General Valves Catalogue

Hattersley Valves Product Directory

Hattersley Valves Product Directory

Case studies

Bellatrix Bio Medical Campus

Bellatrix Bio Medical Campus

Leadenhall

Leadenhall

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