Bursting disc holders + Safety and Relief valve

SITEC Bursting disc holders (Safety heads)

Features and advantages

Very simple protection against unintentional overpressures in HP systems and pilot units. For category I, module A of the “PED 97/23/EC”. For category IV (max. 5000 bar) on request. Absolutely leak-proof – important for laboratory units. Direct installation of the safety heads in all tube connections in SITEC HP valves and fittings. Rupture discs are to be ordered separately.

Stainless-steel rupture discs

Discs on stock: flat seat discs for low pressures and angular seat models for 350 bar and above. Including test certificate 3.1 according EN 10204. Ordering: Complete Part No. by adding burst pressure to the basic No. 728., e.g. burst pressure 700 bar: Part No. 728.0700. Important: The nominal burst pressure is based on a static pressure loading at ambient temperature with a tolerance of 
+/– 10% up to 900 bar, above +/– 5%. The maximum operating pressure should not exceed 80% of the nominal burst pressure. Factors reducing the actual rupture pressure are: cyclic pressures, high temperatures, corrosion, etc. Other pressures, materials (e.g. Hastelloy HC276) and safety heads for discs with flags, on request.

SITEC Safety valves

Features and advantages

Adjustable relief valves against unintentional overpressures in HP systems and pilot plants. All safety relief valves with test certificate. For category I, module A of the “PED 97/23/EC”. For laboratory systems and pilot units. Suitable for gases and liquids. Valves for gas service feature fine-lapped seats and will be factory preset at the desired relief pressure. Soft seat in the valve with the lowest pressure range 50–700 bar. Factory-preset relief pressure marked on valve body. State desired cracking pressure and service requirements (liquid, gas or vapour). Precise adjustment of the cracking pressure. Closing pressure = cracking pressure minus 10%. Safety valves may be mounted in any position. Relief valve set pressure should be 10% higher than maximum system operating pressure. Materials: Stainless steels AISI 316Ti and 17-4 PH.

Options

Factory-sealed relief valves with test certificate.

SITEC Relief valves

Features and advantages

Adjustable pressure limiters in high-pressure systems. Specially recommended for high-pressure systems with intense variations of flow. Suitable for HP liquids like water, mineral oils, brake fluids. Mention the service fluid with the order. Long service life assured by fine ground stem. Easily exchangeable replaceable seat. Factory-preset pressure marked on valve body. State the required cracking pressure with the order please. Variable adjustment of the cracking pressure. Valve body in stainless steel AISI 316Ti. Free assembly positions. Relief valves available at short notice. Bursting disc holders for Cat I PED/2014/68/EU and Cat IV PED/2014/68/EU on request Bursting disc holders + discs in other materials like Hastelloy on request Factory preset and sealed relief valves with certificate