Technical Information Fig. 116 'MF' Series

The Type ‘MF’ Reducing Valve is hydraulically operated, single seated, piston actuated, diaphragm pilot controlled and spring regulated.

Automatically reduces higher and fluctuating inlet pressure to constant outlet pressures regardless of the flow demands.

The diaphragm pilot control closes when outlet setting is attained, diverting inlet pressure to the piston which closes the main valve at the rate determined by the flow restrictor. The “V-Ported” valve guide eliminates closing ‘slam.’ Under operating conditions the main valve establishes a throttling position as determined by the pilot control.

 

Dimensions (mm)

Pilot piping arrangement is indicative only.
Final configuration may vary.
Overall height dimensions are approximate

Valve Size80100150200250300
‘A’360510560690720760
‘B’95140165205230330
‘C’295355445610760915
Mass / kg4265120250450700

Specifications

Sizes80-200mm Flanged
Max Working Pressure2600 kPa
Adjustable Ranges0-115, 70-230, 200-700, 600-1100, 700-1500 kPa

Materials

BodySg Iron or 316SS
Trim316 SS
SealsNitrile, Viton or EPDM
Pilot Valve316 SS
CoatingsEpoxy Coated

Flows (I/sec)

Valve Size100150200250300
Recommended Min24101522
Normal Max.
P/line Vel.
6m/sec.
4080190300430
Occasional Max.
P/line Vel.
8m/sec.
55110250400570

The life of any valve will be shortened by high velocity flows.

Cavitation may occur if the intersection point of inlet and outlet pressures fall within the shaded zone.

The siting of a reducing valve to obtain a higher outlet pressure reduces the risk of cavitation and the need for special trim materials.

When minimum flows are anticipated we recommend that a direct-acting reducing valve be installed in parallel to handle the smaller flows.

Need a customized solution? Get in touch with us today and let us know your requirements.