Mazda Mark I series of self-contained regulators are pilot and piston operated type. The simplest form of this series is a “Pressure Reducing Valve” While control valve may be utilized to handle most regulator type applications, there are distinct advantages in using regulators where possible such as:

A regulator is a self-contained design and needs little or no external tubing.
A regulator acts instantaneously.
A regulator requires no external power source, and hence no downtime due to loss of air and electricity.
A regulator has less chance of external leakage because of its packless construction.
A regulator is economical initial / installation costwise.
A regulator if properly sized is efficient and reliable. (The engineering data/graphs are available for sizing on request.)
Full Lift Pressure Reducing Valve

Pilot and Piston operated self actuating `PRV' controls the downstream pressures with an accuracy of + 1%, regardless of fluctuations in upstream pressure or flowrate. It can be used for steam, air, gases or liquids. Constant downstream is maintained from full flow to 10% of flow (Rangeability 10:1). In the Mark I design, main valve is single seated and normally closed. Initial pressure exerted on the main valve assisted by a main spring force ensure tight shut-off. Irrespective of valve size, pilot assembly remains the same. At the same time, the main valve can be converted from a reducing valve to a Back Pressure Regulator or a Differential Pressure Regulator.

- Balance design unaffected by variations in inlet pressure.
- Instantaneous response to changes in demand.
- Full lift design achieves high flow rates.
- Effective” Low Flow” control due to single seat design.
- Increased seat/chest ratio for lower velocities and quiet operation.
- Stellited trim ensures tight shut-off even after prolonged use.

Sizes : 1/2” to 6”
Cv : 0.05 to 105
End connections : Screwed or flanged upto 600 # rating.
Temperature Limit : Upto 270 oC with stainless steel spring
and 410 oC with Inconel spring.
Pressure Limit : 46 bar

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* On Request Product Catalogue Available