NBS Source
I'm a manufacturer
Compare variants

Fig. 971 Butterfly Valve Fully Lugged

Verified by manufacturer 11 days ago

DN50: Fig. 971

Hattersley Variant:

A fully-lugged, lever (Fig. 970) or gearbox (Fig. 970G) operated gas butterfly valve.

Jump to:
+44 (0)1473 277300 Website

Application

  • Suitable for gas applications.
  • Valves may be used for flow regulation.

Description

A fully-lugged, lever (Fig. 970) or gearbox (Fig. 970G) operated gas butterfly valve.


Features and benefits:

  • Robust ductile iron valve body for long service life.
  • Integrated notch plate for a more compact design.
  • The anti blow-out stem design provides a safe and secure operation.
  • Fully bonded epoxy paint system for superior corrosion resistance.
  • Suitable for applications where Level 3 C3 (medium) corrosion protection is required.
  • Maintenance free valve design, reducing downtime.
  • Valves DN250 and larger supplied as standard with a fully enclosed gear operator.
  • Fig. 971 and Fig. 971G are suitable for Group 1 and 2 gases and Group 1 and 2 liquids, as defined by the Pressure Equipment Directive 2014/ 68/ EU.

General information

Color

Blue

Guidance for specification option:

Epoxy paint on body and lever.

Yellow

Guidance for specification option:

Aluminium bronze disc.

Silver

Guidance for specification option:

Stainless steel shaft and taper pin.

Black

Guidance for specification option:

Buna-N O-ring.

Material

Cast iron

Guidance for specification option:

Gearbox.

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 and BS EN 558.

DN rating

DN50.

Manufacturer guidance

Nominal.

PN rating

Temperature: -10 to +90°C: PN16.

Manufacturer guidance

Each valve is individually hydrostatically tested to BS EN 12266-1 at the following test pressures: Shell (24 bar) and Seat (17.6 bar).

Working conditions

-

Type of fluid

Gaseous.

Maximum working pressure

10 to 16 bar.

Materials

-

Body

Ductile iron (epoxy paint).

Guidance for specification option:

To ASTM A536 64-45-12.

Shaft

Stainless steel grade 410.

Guidance for specification option:

To ASTM A276 410 and stainless steel taper pin.

Disc

Aluminium bronze.

Guidance for specification option:

To C954 ASTM B148.

Seat

Guidance for specification option:

  • O-ring: Buna-N.
  • Bushing: PTFE.
  • Liner: Nitrile.

Operation

-

Manual

Lever.

Guidance for specification option:

Fig. 971: Aluminium alloy (epoxy paint) lever.

Dimensions

109 x 246 x 72 x 43 x 32 x 212.5 x 52.9 x 125 mm.

Manufacturer guidance

  • Lever: Nominal A x A1 x B x C x D x E x G x K.
  • Geared: Nominal A x B x C x D x E x F x G x H x h x M.

Weight

3.6 kg.

Flow capacity

98 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

Similar products from Hattersley

Fig. 4925 - Butterfly Valve Fully Lugged

Fig. 4925 - Butterfly Valve Fully Lugged

Fig. 970 Butterfly Valve Fully Lugged

Fig. 970 Butterfly Valve Fully Lugged

Fig. 970W Butterfly Valve Fully Lugged (WRAS Approved)

Fig. 970W Butterfly Valve Fully Lugged (WRAS Approved)

© 2024 NBS Enterprises Ltd. All rights reserved.