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Fig. 971 Butterfly Valve Fully Lugged

Verified by manufacturer 22 days ago

DN100: Fig. 971

Hattersley Variant:

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

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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

Stainless steel

Guidance for specification option:

Shaft and taper pin.

Steel

Ductile iron

Guidance for specification option:

Body with epoxy paint.

Aluminium

Guidance for specification option:

Alloy for lever, epoxy painted and aluminium bronze for disc.

Rubber

Guidance for specification option:

  • Buna-N O-ring and Nitrile liner.
  • Polytetrafluoroethylene (PTFE) bushes.

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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

DN100.

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

163 x 343 x 108 x 52 x 32 x 212.5 x 104.4 x 180 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

6.5 kg.

Flow capacity

512 Kv.

Thread size

8 x M16.

Manufacturer guidance

Number x thread size.

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