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Fig. M425 Pressure Reducing Valve
Fig. M425 Pressure Reducing Valve

Verified 15 days ago

Hattersley

DN100

Verified 15 days ago

Hattersley

DN150

Summary
Ductile iron pressure reducing valve, PN25.
Ductile iron pressure reducing valve, PN25.
Color
Blue, Yellow, Brown, Silver
Blue, Yellow, Brown, Silver
Material
Cast iron
Cast iron

Specification

Standard
To BS EN 558 Series 1.
To BS EN 558 Series 1.
Third-party certification
Water Regulations Advisory Scheme-approved.
Water Regulations Advisory Scheme-approved.
Form
Water pressure reducing.
Water pressure reducing.
Adjustment
Adjustable.
Adjustable.
Operating conditions
-
-
Temperature (maximum)
85°C.
85°C.
Maximum working pressure
25 bar.
25 bar.
Connections
Flanged to BS EN 1092-2.
Flanged to BS EN 1092-2.

Additional properties

Inlets/outlets diameter
DN100.
DN150.
Dimensions
350 x 390 x 43 x 43 mm.
480 x 500 x 88 x 48 mm.
Weight
43 kg.
48 kg.
Material (all components)
Body, disc, diaphragm disc, O-ring and cover: Ductile iron, Plug, adaptor and air release nut: Brass, Body seat, bolt locking plate, washer bolt and nut: Stainless steel, Seat locking bolt and long bolt: Stainless steel grade 304, Stem: Stainless steel grade 303, Spring: Stainless steel grade 302, Washer, spring washer, nut and bolt: Stainless steel grade 316, Nameplate: Aluminium, Disc facing, O-ring and diaphragm: Rubber, Lifting nut and guide cover bolts: Steel, Guide cover: Brass/ bronze, Disc guide: Bronze and stainless steel.
Body, disc, diaphragm disc, O-ring and cover: Ductile iron, Plug, adaptor and air release nut: Brass, Body seat, bolt locking plate, washer bolt and nut: Stainless steel, Seat locking bolt and long bolt: Stainless steel grade 304, Stem: Stainless steel grade 303, Spring: Stainless steel grade 302, Washer, spring washer, nut and bolt: Stainless steel grade 316, Nameplate: Aluminium, Disc facing, O-ring and diaphragm: Rubber, Lifting nut and guide cover bolts: Steel, Guide cover: Brass/ bronze, Disc guide: Bronze and stainless steel.
Integral accessories
Strainer, built-in pressure gauge and pilot valve.
Strainer, built-in pressure gauge and pilot valve.
DownstreamPressure
0.5–6 bar.
0.5–6 bar.
FlowRateRange
1–160 m³/h.
1–350 m³/h.
Volume
0.7 L.
1.5 L.
Flow capacity
167 m³/h.
407 m³/h.

Sustainability data

Material
Cast iron
Cast iron
Recyclability
Recycle locally
Recycle locally
Expected Life
20 year
20 year