STC Ammonia Shut-off Valve STC are angleway and straightway shut-off valves which are designed to meet industrialrefrigeration application requirements. The valves are designed to give flavourable flow characteristics and are easy to dismantle and repair when necessary Features and benefits Applicable to all common refrigerants including R717 and non corrosive gases/ liquids dependent on sealing material compatibility Heavy duty industrial handwheel for frequent operation Vented cap for infrequent operation Available in angle and straight versions with standard bonnet for installation in normal insulated systems STC-X with extra high quality housing to meet the requirement for X-ray approval DN 15 - 150 (½ - 6 in.) Can accept flow in both directions Max. working pressure: 25 bar (365 psig) Temperature range: -50 °C – 150 °C (-58 °F – 302 °F) Design specification according to DIN 3158 SVA Ammonia Shut-off Valve SVA shut-off valves are available in angle way and straightway versions and with Standard neck (SVA-S) and Long neck (SVA-L). The shut-off valves are designed to meet allindustrial refrigeration applicationrequirements and are designed to givefavourable flow characteristics and are easy todismantle and repair when necessary. The valve cone is designed to ensure perfect closing and withstand a high system pulsation and vibration, which can be present specifically in the discharge line. Features and benefits Applicable to HCFC, HFC, R717 (Ammonia), R744 (CO2 ) and all flammable refrigerants. Each valve housing is available with several different connection types and sizes Possible to convert SVA-S or SVA-L to any other product in the Flexline™ SVL family (hand operated regulating valve, check & stop valve, check valve or strainer) just by replacing the complete top part Fast and easy valve overhaul service. It is easy to replace the top part and no welding is needed Heavy duty industrial hand wheel for frequent operation Cap for infrequent operation Available in angleway and straightway versions with Standard neck or Long neck (DN 15 to DN 40) for insulated systems Each valve type is clearly marked with type, size and performance range The valves and caps are prepared for sealing, to prevent operation by unauthorized persons, using a seal wire Internal metal backseating: – DN 6 - 65 (¼ - 2½ in.) Internal PTFE backseating: – DN 80 - 200 (3 - 8 in.) Can accept flow in both directions Housing and bonnet material is low temperature steel according to requirements of the Pressure Equipment Directive and other international classification authorities Equipped with stainless steel bolts Max. working pressure: 52 bar / 754 psig Temperature range: -60/ 150 °C (-76/ 302 °F) Classification: DNV, CRN, BV, EAC etc. To get an updated list of certification on the products please contact your local Danfoss Sales Company
