Pressure & Flow Control Industries Makarpura, Vadodara, Gujarat

Vaccum Relief Valve are designed for vaccum applications only. This provides protection against over vaccum conditions.        

  This Type Of Hatch Is Used In Order To Prevent Vapor Loss Inside A Fuel Tank In The Process Of Measuring.This System Consists Of Two Parts (Assembled Together).         The Upper Housing Takes A Sample Device Inside And The Upper Lid Is Closed. Then The Lower Housing Lid Opens And The Sample Device Is Dipped In To The Tank. Thus The System Is Completely Closed To Atmosphere. Generally Non - Sparking Aluminum Is Used For Manufacture.The Lock Down Cover Edges Are Assembled With Rubber O'rings to Prevent Leakage Possibility.         To Ensure Joints And Locks Breakdown Due To Petroleum Vapor And Weather Conditions They Are Manufactured Of Stainless Steel.

Pressure Relief Valve are designed for only relief of pressure application this provides protection against over pressure condition.        

  PRE'CON Pressure Vacuum Relief Valve are designed to provides protection aginst over pressure or over vaccum and prevents evaporation losses of products.           The PVRV maintains tight seal till the pressure or vaccum of the tank or system exceeds the set pressure or vaccum of the valve. When pressure or vaccum increases the weighted pallet lifts and breaks the seal between the seat & pallet and allows the vapor to escape.

Pipeaway Pressure & Vaccum Relief Valve are designed for pipe away application this provides protection against over pressure & over vaccum conditions.        

Like other pressure relief valves (PRV), pilot operated relief valves (PORV) are used for emergency relief during overpressure events (e.g. a tank gets too hot and the expanding fluid increases the pressure to dangerous levels). The distinction between PORV and conventional PRV is that pilot valves use system pressure to seal the valve. APRV typically uses a spring to hold the disc or piston on seat. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called the dome.         The pressure from the pilot tube to the dome is routed through the actual control pilot valve. Thereare many designs but the control pilot is essentially a conventional PRV with the special job of controlling pressure to the main valve dome. When the pilot valve reaches set pressure it opens and releases the pressure from the dome. The piston is then free to open and the main valve exhausts the system fluid. The control pilot opens either to the main valve exhaust pipe or to atmosphere.         Snap Acting: At set pressure the valve snaps to full lift, it can be quite violent on large pipes with significant pressure. The pressure has to drop below the set pressure in order for the piston to reseat.         Modulating: The pilot is designed to open gradually, so that less of the system fluid is lost during each relief event. The piston lifts in proportion to the overpressure. Blowdown is typically short.         The PRECON Pilot Operated Relief Valve is used to replace weight-loaded or spring loaded valves in many applications to increase efficiency and reduce evaporation losses. Several advantages are obtained over the traditional type. For example, the process pressures may be closer to the set pressure than would be considered prudent and safe with the traditional valve. Additionally, greater conservation is obtained due to minimum product loss which in turn provides increased profits.         Product Features         Sizes 2" through 12" Choice of aluminum, carbon steel, stainless steel, or special materials for the main body Ease of precision settings Only the pilot needs to be set Lower profile and weight than spring operated models for high settings Full open at less than 10% overpressure Modulating action conserves product since valve opening is proportional to overpressure Soft seats seal tight to conserve product and minimize valve wear which improves reliability               Pressure & Flow Control Industries Manufacturers, Exporters, Traders, Importers, Suppliers ofPilot Operated Pressure Relief Valves

  PRE'CON Model No. PFCI/GH/2052 Type 1 & 2 provide access for gauging or obtaining product samples from storage tank. The model incorporates positive cover which cover which assures a tight seal on tanks.         When a fire occure near the storage tank which is having flammable liquid, the heat is transmitted through the tank walls causing the liquid to vaporize more quickly this condition create a relatively high pressure & volume within the tanks vapor space. In the absence of required emergency relief, an explosion could occur, which may have disastrous effect on human life & property. Special Features         Model No. PFCI/GH/2052 type 1 & 2 is designed with serrated foot paddle surface to avoid slippage of foot while opening.         This model permits use of both hands during gauging or sampling. Up on removal of pressure on foot paddle the cover will close due to gravity.         PRE'CON type 1 is available in soft seating surface where as the type 2 is available in metal to metal seating.         Pressure & Flow Control Industries Manufacturers, Exporters, Traders, Importers, Suppliers ofGauge Hatch

  Flame arrester protect storage, distribution and chemical process facilities containing flammable gases and liquids from fire and explosions. It is an effective device which isolates source of ignition and allows vapor to flow freely in venting and colletion system.         The most effective method of quenching flame is to install Pre'con flame arrester either at the strategic point along with pipe work system or at end of the pipe line where gas / vapor are being vented into atmosphere.         Flame Arrester are designed to give maximum air flow consistent with operating effeciency, fire protection and low maintenance cost. Flame arrester operates on the principal; removing of heat from the flame, as it attempts to travel through narrow passage with wall of metal or other heat conductive materials for instance PRE'CON Flame arrester employ layers of metal ribbons with crimped corrugations as shown below : CRIMPED WOUND METAL RIBBON ELEMENT         The above construction produces a matrix of uniform opening which are carefully constructed to quench flame by absorbing the heat of the flame. This provides an extinguishing barrier to the ignited vapor mixture.