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Fig. 973 Double Regulating Valve

Verified by manufacturer 9 days ago

DN50: Fig. 973

Hattersley Variant:

Ductile iron double regulating valve.

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Application

Suitable for Chilled Water, LTHW and MTHW.

Description

Ductile iron double regulating valve, with ANSI version option MHA733.


Features and benefits:

  • Robust iron body materials for long service life.
  • Precise flow regulation.
  • Fully-lugged – easy to install and operate.
  • Positive flow control at all settings.
  • Valves up to and including 200 mm can be supplied lever or gear box operated.
  • Valves 250 mm and above supplied gear box only.
  • All operators fitted with double regulating feature.
  • Butterfly valves should not be less than 30° open when used for regulation duties.

General information

Color

Blue

Guidance for specification option:

Body and handwheel.

Silver

Yellow

Guidance for specification option:

Disc.

Material

Rubber

Guidance for specification option:

  • EPDM liner (seat).
  • Polytetrafluoroethylene (PTFE) bearings.

Stainless steel

Guidance for specification option:

Stem and disc.

Steel

Ductile iron

Guidance for specification option:

Body.

Aluminium

Guidance for specification option:

Aluminium bronze disc.

Uniclass

Pr_65_54_95_26 Double regulating valvesPrimary
Pr_65_54_95_08 Butterfly valves

CAWS

S90/650 Flow-reducing/ servicing valves

S90/650 Flow reducing/ servicing valves

Specification data - Double regulating valves

Standard

To BS EN 593: 2009.

Material

Body: Ductile iron, Shaft: Stainless steel grade 431, Disc: Aluminium bronze, Liner: EPDM, Bearings: PTFE.

Guidance for specification option:

Standard with stainless steel shaft to BS EN 10088-1 X17CrNi16-2, ASTM AISI 431.

.

Body: Ductile iron, Shaft: Stainless steel grade 431, Disc: Stainless steel grade 304, Liner: EPDM, Bearings: PTFE.

Guidance for specification option:

Fig. 4973 and Fig. 4973G option: Stainless steel disc to BS EN 10270 X10CrNr18-8, ASTM A276 304.

Manufacturer guidance

  • EPDM liner: Ethylene Propylene Diene Monomer.
  • Ductile iron body to BS EN 1563 EN-JS 1040, ASTM A536 65-45-12.

  • Aluminium bronze disc to BS EN 1982 CC333G, ASTM B148 C95800.

PressureRange

Temperature: -10 to +120°C: 16 bar.

Guidance for specification option:

PN16.

Manufacturer guidance

Test pressures: Shell (24 bar) and seat (17.6 bar).

Inlets/outlets diameter

DN50.

Manufacturer guidance

Nominal.

Dimensions

195 x 83 x 44 x 32 x 102 x 260 x 32 mm.

Manufacturer guidance

  • Lever: A x B x C x D x E x F x G.
  • Geared: A x B x C x D x E x F x G x K.

Weight

4.0 kg.

Flow capacity

167 Kv.

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