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Home » Products » Breather Valves » Pressure Relief Valve

Pressure Relief Valve

Pressure Relief Valve
Pressure Relief Valve
Product Code : PFCI-BV-2049
Price And Quantity
  • Minimum Order Quantity
  • 1 pc.
  • Unit of Measure
  • Piece/Pieces
Product Specifications
  • Structure
  • Diaphragm
  • Power
  • Hydraulic Watt/Volt ( w/v)
  • Pressure
  • Medium Pressure
Product Description

Pressure Relief Valve is a type of valve which is used to control or limit the pressure in a system. It is designed to open at a predetermined set pressure to protect pressure system  from being subjected to pressures. This valve is designed to maintain consistent upstream pressure within close limits. In fast opening and closing, Pressure Relief Valve provides system protection against high pressure on pump start up and pump shut down  by break up the excess pressure to a safe location.

Application :-

Direct acting pressure relief valves are low pressure devices specifically designed to protect tanks, process systems and equipment from excessive pressure. As well as providing the primary layer of protection for tanks and process systems, pressure Relief valves also minimize emission losses of gases or vapors, thus protecting the environment and providing significant financial savings.

Principle of Operation :-
PRECON pressure relief valves have weight-loaded or spring-loaded pallets. Flow through the valve is controlled by the weight of the pallet or the spring force acting on the pallet to keep the device closed. Once the pressure in the tank reaches the pallet closing force, the pallet will start to lift off the seat and allow flow through the valve.

Due to its air-cushioned sealing technology, PRECON® valves prevent emission losses until very close to the set pressure. The geometry of the valves has been developed in order to optimize overall performance in terms of high flow capacity, set pressure, sealing and re-sealing. The modular nature of PRECON® valves means they can be tailored to meet specific customers’ requirements: whether this is pressure protection only; or vapors and gases either piped-away or vented to atmosphere. A weather hood protects the pressure vent port and a mesh screen is fitted to prevent intrusion of foreign matter into the valve.

Features & Benefits :-

• Pressure relief valves provide high flow capacity from a compact valve size.

• Wide range of pressure settings to provide maximum tank protection while ensuring minimum gas loss.

• Designed and manufactured to API 2000 / ISO 28300.

• Seat leakage requirements of API 2000/ ISO 28300.

• Low leakage minimize evaporation loss.

• Economic savings due to reduced product loss.

• Alternative connection types available on request.

• Valve sizing service assists optimum valve performance / cost specification.

Product Attributes :-

• Designed and tested according to API2000.

• Sizes available from 1.1/2” to 12” NB.

• Standard materials include carbon steel and stainless steel. Others on request .

• Vented to atmosphere.

• Modular construction.

• The inlet flanges are in accordance with ASME B16.5 150LB RF. Others on request.

• PTFE/FEP diaphragms effectively prevent the seat and pallet from sticking.

• Valves can be specially supplied with a flame Arrester.

Technical Details of Pressure Relief Valves :-

TABLE – 1 SELECTION OF MATERIAL

DESCRIPTION

A

B

C

D

Body

Cast Aluminium

CS

A 351 CF8

A351 CF8M

Seat

SS304

SS304

SS304

SS316

Diaphragm

PTFE

PTFE

PTFE

PTFE

Stem

SS304

SS304

SS304

SS316

Weather hood

Aluminum

Aluminum

Aluminum

Aluminum

Screen

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Fasteners

MS Zinc plated

MS Zinc plated

SS304

SS316

Any special materials like ECTFE coating, PTFE coating, FRP coating, Poly Propylene, Hast alloy upon request.

Size

40 mm

50 mm

65 mm

80 mm

100 mm

150 mm

200 mm

250 mm

300 mm

Accuracy : + 5% up to 20 mbar Accuracy : + 3% above 20 mbar

Settings for Weight Loaded Design

Pressure : 2 mbar to 40 m bar

20 mm Wc to 400 mm Wc

Settings for Spring Loaded Design

Pressure : > 40 mbar to 1000 m bar

>400 mm Wc to 10000 mm Wc


 
Trade Information
  • Payment Terms
  • Cash Advance (CA), Cash in Advance (CID), Cheque
  • Main Export Market(s)
  • Asia, Australia, Central America, North America, South America, Eastern Europe, Western Europe, Middle East, Africa
  • Main Domestic Market
  • All India

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