The SVP-7200 pilot operated pressure relief valves are able to operate at considerably higher set pressure than is possible with spring loaded safety relief valves, the valve operation and lift are unaffected by back-pressure.

The AST pilot operated safety relief valves are designed and manufactured according to 97/23/CE P.E.D. and ASME VIII, API527 requirement. They have passed several laboratories tests to obtain the conformance to the Pressure Equipment Directive, PED 97/23CE, accordingly to the product regulation EN ISO 4126-4 for use with gas, vapour and liquid. Many other homologations and approvals are available like ATEX, GOST R for Russia and others.

Different pilots characteristics are available like pop action or modulating, non- flowing or flowing on dependence of customer needs.

AST provide a wide range of materials, flange styles and options to meet the most demanding pressure relief application.

Orifice Sizes: From “D” to “T” according to API 526; full bore orifices available.

Connections: From NPS ½ x 1 to NPS 8 x 10, also available with double outlet flanges

Inlet flanges ratings: Up to Class 2500

Features and benefits                                                                                                       

– Full nozzle design

– Flanged connections can be manufactured according to a wide range of standards

– Bubble-tight seats near set pressure allow high operating pressure and are not as sensitive to vibrational and pulsating service

– Available with metallic or soft seats

– Vertical pilot mounting ensures consistent set pressure and blow-down as contrasted to erratic, horizontally mounted pilots

– All pressurized parts are hydraulically tested

– The high flow coefficients allow the most economical sizing of the valve

– Materials in compliance with NACE standards and wide range of optional exotic materials

– A variety of accessories and options are available like fields test connection, field test indicator, backflow preventer, pilot supply filter, pressure spike snubbers and others

The SMS-7100 direct spring operated pressure relief valves has been designed to protect against excess pressure steam boilers and to provide superior performance.

These valves are designed and manufactured according to 97/23/CE P.E.D. and ASME I and are approved according to 97/23/CE P.E.D. These valves have many other homologations and approvals; ATEX, AQSIQ for China, GOST R for Russia and others

Double blow-down ring guarantees the over-pressure and the reseating-pressure required on section I of the ASME code. Special design of the disc eliminates the distortion due to thermal stress for maximum seat tightness. Available with open or closed bonnet.

Orifice Sizes: From “D” to “T “

Connections: From NPS 1×1 ½ to NPS 8×12 – DN 25×40 to DN 200×300

Inlet flanges ratings: Up to Class 2500 – PN 320

Features and benefits                                                                                                 

– Valve bodies are heavy duty design

– Full nozzle design

– Flanges can be manufactured according to a wide range of standards

– Dual blow-down ring for more precise performance: 3% over pressure and 4% blow-down

– All pressurized parts are hydraulically tested

– Seats lapped to optical flatness for tight shut-off

– The high flow coefficients allow the most economical sizing of the valve

– Among foreign certifications

– Ease maintenance

– Proven reliability

The CV-8000 have an extensive choice of type, sizes, body ratings, trim styles and materials to provide the user with maximum control and throttling versatility. Our range include globe single seated, globe double seated, three way combining, diverting and angle.

Heavy duty construction of high quality cast steel and stainless steel trim  to guarantee quality, reliability and minimise downtime and maintenance costs. Advanced conception design gives maximum part interchangeability degree

The AST control valves are designed, manufactured and tested according to 97/23/CE P.E.D. and IEC60534 requirement. Many other homologations and approvals are available; ATEX, GOST R and others.

AST provide a  wide range of materials, flange standards and options to meet the most demanding application.

Flow characteristics: Equal percentage, linear and quick-opening.

Connections: From NPS 1” to NPS 16”

Flanges ratings: Up to Class 2500

Tightness class: Metal seated with class IV or V according to IEC60534-4, Soft seated with class VI according to IEC60534-4 

Features and benefits                                                                                                          

– Globe, angle and 3-way body

– All pressurized parts are hydraulically tested

– Flanged connections can be manufactured according to a wide range of standards

– Extension bonnet for high and low temperature service

– Bellows seal bonnet for service when stem leakage can not be tolerated

– Standard packing are done with teflon (up to 200°C) rings or graphite rings (above 200°C), different solution for packing can be provided,  including vacuum service

– Easy maintenance

– Materials in compliance with NACE standards and wide range of optional exotic materials

– A variety of accessories and options are available like hand-wheel, positioners (pneumatic, analogical and digital), booster, quick-exhaust, limit switch, reservoir volume tank etc.

Pressure Relief Valve Type–SV-200-LP, SV-200-MP, SV-200-HP & SV-300 

This product range is mainly used for Thermal Relief application but thanks to the certified coefficient of discharge for gas and liquid it can be used also for pressure relieving application. Types SV-200 covers the application where users have preference for screwed connection. These valves are available with inlet sizes from ½” to 1” and pressure from 0.8 Bar to 400 Bar for Gas & up to 1500 Bar for Liquid in various material combinations. Type SV-300 has flanged end connections with an integral casted body.

Media : Gas, Steam and Liquid.

Over pressure : Gas and Steam and Liquid 10%.

Blowdown : Gas and Steam 5% to 7%

Orifices: from “b” to “f”.

Set pressure range : From 0.8 bar to 400 bar (for Gas), up to 1500 bar for Liquid.

Temperature range : From -200 °C to 400 °C.

Materials : Carbon Steel, Alloy Steel, Hastelloy, Monel and other material upon request.

Options : Bellows, Flushing nozzles, Lifting lever, Test gag, Resilient or Hardened seat