Relief Valves

  • Rs. 0.00

    • Product Code: Relief Valves

    Relief Valves


    H SERIES PROPORTIONAL RELIEF VALVE 6,000 PSI


    The valves offer a choice of 14 different ranges of opening (or ‘cracking’) pressures, from 10-25 to 4,975-6,000 PSI (0.7-1.7 to 343-414 bar). A low friction stem seal and a balanced poppet design ensures accurate and consistent cracking pressure, regardless of system back pressure. Cracking pressure is maintained to within 3% of its setting, and can be finely adjusted by means of an external nut, secured in position by Parker’s unique Tru-Loc™ mechanism.

    The connections are available in 6 mm and 1/4" sizes, and with choice of male or female NPT, Parker CPI™ single ferrule or Parker A-LOK® double ferrule compression fittings.

    All H series pressure relief valves are manufactured from 316 stainless steel. The maximum operating pressure rating and permissible temperature range depends on the particular model. For maximum applications flexibility, there is an extensive choice of O-ring seal materials, including fluorocarbon rubber, Buna-N, ethylene propylene rubber, highly fluorinated fluorocarbon rubber and neoprene rubber.

    Parker’s H series proportional pressure relief valves are CE marked and certified to the highest Category-IV level of the Pressure Equipment Directive (PED).

     

    RH4 Series Relief Valves

    Parker RH4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure.

    Features

    ·         Pressure settings are externally adjustable while the valve is in operation. Eight different spring ranges provide greater system sensitivity and enhanced performance.

    ·         Captured molded seat design is blow-out and chip resistant.

    ·         Manual Override option with positive stem retraction is available for pressures up to 1500 psig (103 bar).

    ·         This option permits the user to relieve upstream pressure while maintaining the predetermined

    ·         cracking pressure.

    ·         Color coded springs and labels indicate spring cracking range.

    ·         Lock wire feature secures a given pressure setting.

     

     

    RL4 Series Relief Valves

    Parker RL4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure.

    Features

    ·         Pressure settings are externally adjustable while the valve is in operation. Seven different spring ranges provide greater system sensitivity and enhanced performance.

    ·         Manual override option with positive stem retraction is available for the full working pressures range. This option permits the user to relieve upstream pressure while maintaining the predetermined cracking pressure.

    ·         Color coded springs and labels indicate spring cracking range.

    ·         Back pressure has minimum effect on cracking pressure.

    ·         Lock wire feature secures a given pressure setting.

    Relief Valves


    H SERIES PROPORTIONAL RELIEF VALVE 6,000 PSI


    The valves offer a choice of 14 different ranges of opening (or ‘cracking’) pressures, from 10-25 to 4,975-6,000 PSI (0.7-1.7 to 343-414 bar). A low friction stem seal and a balanced poppet design ensures accurate and consistent cracking pressure, regardless of system back pressure. Cracking pressure is maintained to within 3% of its setting, and can be finely adjusted by means of an external nut, secured in position by Parker’s unique Tru-Loc™ mechanism.

    The connections are available in 6 mm and 1/4" sizes, and with choice of male or female NPT, Parker CPI™ single ferrule or Parker A-LOK® double ferrule compression fittings.

    All H series pressure relief valves are manufactured from 316 stainless steel. The maximum operating pressure rating and permissible temperature range depends on the particular model. For maximum applications flexibility, there is an extensive choice of O-ring seal materials, including fluorocarbon rubber, Buna-N, ethylene propylene rubber, highly fluorinated fluorocarbon rubber and neoprene rubber.

    Parker’s H series proportional pressure relief valves are CE marked and certified to the highest Category-IV level of the Pressure Equipment Directive (PED).

     

    RH4 Series Relief Valves

    Parker RH4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure.

    Features

    ·         Pressure settings are externally adjustable while the valve is in operation. Eight different spring ranges provide greater system sensitivity and enhanced performance.

    ·         Captured molded seat design is blow-out and chip resistant.

    ·         Manual Override option with positive stem retraction is available for pressures up to 1500 psig (103 bar).

    ·         This option permits the user to relieve upstream pressure while maintaining the predetermined

    ·         cracking pressure.

    ·         Color coded springs and labels indicate spring cracking range.

    ·         Lock wire feature secures a given pressure setting.

     

     

    RL4 Series Relief Valves

    Parker RL4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure.

    Features

    ·         Pressure settings are externally adjustable while the valve is in operation. Seven different spring ranges provide greater system sensitivity and enhanced performance.

    ·         Manual override option with positive stem retraction is available for the full working pressures range. This option permits the user to relieve upstream pressure while maintaining the predetermined cracking pressure.

    ·         Color coded springs and labels indicate spring cracking range.

    ·         Back pressure has minimum effect on cracking pressure.

    ·         Lock wire feature secures a given pressure setting.

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