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Fig. MH739 Commissioning Set - Fixed Orifice Double Regulating Valve

Verified by manufacturer 6 months ago

DN65

Hattersley Variant:

Ductile iron fixed integral orifice, double regulating valve.

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Application

  • Primarily used in injection or other circuits requiring a double regulating valve for system balancing.
  • Suitable for flow regulation and isolation.
  • Supplied with Fig. 631 test points to enable flow measurement.

Description

Ductile iron fixed integral orifice, double regulating valve with ANSI version option MHA739.


Features and benefits:

  • Single unit Y-Pattern globe valves incorporating an integral orifice plate, to form a fixed orifice flow measurement unit with regulation and isolation capacity.
  • The Double Regulating feature allows the valve to be used for isolation and to be reopened to its pre-set position, to maintain required flow rate.
  • Accuracy of flow measurement is ±5% at all open positions of the valve, in accordance with BS 7350: 1990.
  • Primarily used in injection or other circuits requiring a double regulating valve for system balancing.
  • External spray epoxy coated for improved durability.
  • Supplied with Fig. 631 test points to enable flow measurement.
  • Valve operation by means of a hand wheel.

General information

Color

Blue

Guidance for specification option:

  • Body, bonnet and handwheel.
  • Downstream test point marker.

Silver

Guidance for specification option:

Stem.

Red

Guidance for specification option:

Upstream test point marker.

Yellow

Material

Bronze

Guidance for specification option:

Disc bush and seat ring.

Rubber

Guidance for specification option:

EPDM coating on cast iron disks.

Brass

Guidance for specification option:

Gland (65 to 150 mm).

Stainless steel

Guidance for specification option:

Stem.

Steel

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Uniclass

Pr_65_54_95_26 Double regulating valvesPrimary

CAWS

S90/650 Flow-reducing/ servicing valves

S92/435 Sprinkler valve sets

S90/650 Flow reducing/ servicing valves

S92/435 Control valve sets

Specification data - Double regulating valves

Standard

To BS 7350.

Arrangement

Globe (Y-pattern).

Material

Body and bonnet: Ductile iron, Disc: EPDM coated cast iron, Disc bush and seat ring: Bronze, Stem: Stainless steel grade 410 – 1.4006, Packing and bonnet gasket: Non-asbestos, Gland (65 to 150 mm): Brass CW614N, Gland (200 to 300 mm): Cast iron.

Manufacturer guidance

  • EPDM: Ethylene Propylene Diene Monomer.
  • Ductile iron to BS EN 1563 GJS-450-10.
  • Bronze to BS EN 1982.
  • Stainless steel grade 410 to BS EN 10088-3, 1.4006.
  • Brass to BS EN 12164: 2016 CW614N.
  • Cast iron to BS EN 1561 EN-GJL-250.

Connections

Flanged to BS EN 1092-2, PN16 and Flanged to ANSI B16.1, Class 125.

Guidance for specification option:

MH739: Formerly to BS 4504.

PressureRange

Temperature: -10 to +120°C: PN16.

Guidance for specification option:

Ratings align with BS EN 1092-2 PN16 (formerly BS 4504).

Inlets/outlets diameter

DN65.

Manufacturer guidance

Nominal.

Dimensions

290 x 262 mm.

Manufacturer guidance

Nominal A x B.

Weight

16.3 kg.

Flow capacity

93 (Kv), 90 (Kvs).

Guidance for specification option:

Kv: Partially open valve.

Manufacturer guidance

  • Kv: Partially open valve.
  • KVS: Fully open valve.


PressureLossCoefficient

6.9.

Manufacturer guidance

Headloss coefficient (K).

Integral accessories

Fig. 631 test points.

Manufacturer guidance

Supplied with red and blue test points to enable flow measurement.

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