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Pressure Seal

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  • Design in accordance with ASME B16.34.
  • Designed to close quickly and quitely. It minimize damage due slamming or noise due vibration caused due high velocity reverse flow before completion of closing.
  • Cover retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket. Bonnet retains the packing system and incorporate also integral back seat system.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnet-gasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve a better seal and increase life of sealing area due provided corrosion resistance.
  • Body guide ribs hardfaced on some sizes of globe, stop check and angle globe patterns provide body guiding for disc or piston assemblies.
  • Seat ring with stellite 6 overlay for better sealing service provide wear, abrasion and erosion resistance. Seat ring is welded to the body to provide tight joint.
  • Body guided plug disc designed to avoid vibration and/or misalignement during opening or closing. Sealing areas of the disc with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request.
  • Valve can be provided with spring as per Customer request.
  • Equilizar Pipe as per Customer Request
  • Damper and counterweight options also available as per Customer request.
  • Piston Check valve works also to offer protection in case of back flow due lost of pressure.
  • Valve suitable for horizontal or vertical position (when spring is requested).
  • Test in accordance with API-598.
  • Design in accordance with ASME B16.34.
  • Designed to close quickly and quitely.
  • Cover retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to  increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket. Bonnet retains the packing system and incorporate also integral back seat system.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnet-gasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve a better seal and increase life of sealing area due provided corrosion resistance.
  • Seat ring with stellite 6 overlay for better sealing service provide wear, abrasion and erosion resistance. Seat ring is welded to the body to provide tight joint.
  • Sealing areas of the disc with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request.
  • Damper and counterweight options also available as per Customer request.
  • Test in accordance with API-598.
  • Caution: install this valve in a horizontal position only. Contact Walworth for other installation orientations.
  • Design in accordance with ASME B16.34.
  • Designed to close quickly and quitely. It minimize damage due slamming or noise due vibration caused due high velocity reverse flow before completion of closing. Design also suitable for low pressure drop.
  • Cover retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket. Bonnet retains the packing system and incorporate also integral back seat system.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnetgasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve a better seal and increase life of sealing area due
    provided corrosion resistance.
  • Seat ring with stellite 6 overlay for better sealing service provide wear, abrasion and erosion resistance. Seat ring is welded to the body to provide tight joint.
  • Sealing areas of the disc with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request.
  • Damper and counterweight options also available as per Customer request.
  • Test in accordance with API-598.
  • Design in accordance with ASME B16.34. “Y” Pattern design increase Cv.
  • Handwheel design made of ASTM A197 or ASTM A216 grade WCB provides more efficient transfer of loads with minimum weight. Impactor handwheel provides closing force for positive sealing against disc or back seat. Gear operator is also available for easy operation and maximum torque.
  • Thrust bearings for larger sizes minimize torque requirements and facilitate operation due the smooth forces involved.
  • Stem guide collar is designed with strong construction to prevent stem rotation; also is suitable for position indicator as per Customer request.
  • Yoke designed with two windows for easy disassembly and access to the packing chamber or bonnet retainer when maintenance is required.
  • Yoke sleeve design permit removal from from the yoke while the valve still in service. Due the material of manufacturing ASTM A439 D2 or B148 95600 reduce coefficient of friction reducing torque operation, minimize wear and eliminate galling.
  • Stem packing system of two sacrificial packings on top and bottom of the chamber made from braided graphite; remaining rings are made from flexible graphite anti extruxion rings for low fugitive emmisions control. Optional live load packing system with extra deep stuffing box and bellevile washers is available upon request.
  • Eye Bolt Clamp design allows easy access to the packing chamber and keeps fixed loads on the stem packing regardless of bonnet position.
  • Bonnet retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket.  Bonnet retains the packing system and incorporate also integral back seat system.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnet-gasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve a better seal and increase life of sealing area due provided corrosion resistance.
  • Body guide ribs hardfaced on some sizes of globe, stop check and angle globe patterns provide body guiding for disc or piston assemblies (not shown).
  • Stem with ACME thread is polished to improve low fugitive emmisions control and easy operation during opening and closing. Back seat is provided with differential angle with bonnet back seat for packing change even in service.
  • Seat ring with stellite 6 overlay for better sealing service provide wear, abrasion and erosion resistance. Seat ring is welded to the body to provide tight joint.
  • Body guided plug disc designed to avoid vibration, bending of the stem and/or misalignement during opening, closing or trhottle service. Sealing areas of the disc with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request.
  • Test in accordance with API-598.
  • Design in accordance with ASME B16.34.
  • Handwheel design made of ASTM A197 or ASTM A216 grade WCB provides more efficient transfer of loads with minimum weight. Gear operator is also available for easy operation and maximum torque.
  • Yoke cap ASTM A515 grade 70 allows easy access to the bearing chamber.
  • Thrust bearings for larger sizes minimize torque requirements and facilitate operation due the smooth forces involved.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve better seal and increase life of sealing area because enhance corrosion resistance. Strong construction of body provides maximum life service and flow efficiency. Options for body material are given in other sections of this catalog. Special materials can be supplied upon request.
  • Yoke designed with two windows for easy disassembly and/or access to the packing chamber or bonnet retainer when maintenance is required.
  • Yoke sleeve design permit yoke removal while the valve still in service. Due the material of manufacturing ASTM A439 D2 or B148 95600 reduce friction coefficient reducing torque operation, minimize the wear and eliminate galling.
  • Stem packing system of two sacrificial packings on top and bottom of the chamber made from braided graphite; remaining rings are made from flexible graphite anti extruxion rings for low fugitive emmisions control. Optional live load packing system with extra deep stuffing box and bellevile washers is available upon request.
  • Eye Bolt Clamp design allows easy access to the packing chamber and keeps fixed loads on the stem packing regardless of bonnet position.
  • Bonnet retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to  increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket. Bonnet retains the packing system and incorporate also integral back seat.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnet-gasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Stem with ACME thread is polished to improve low fugitive emmisions control and easy operation during opening and closing.
  • Back seat is provided with differential angle with bonnet back seat for packing change even in service (not shown).
  • Seat rings with stellite 6 overlay forbetter sealing service provide wear, abrasion and erosion resistance. Seat rings are welded to the body to provide tight joint.
  • Body guided to minimize thrust loads due flow conditions and guide wedge / parallel slide disc during opening and close. Also helps to avoid damage of the wedge because does not permitt sealing areas stroke against seats.
  • Flexible wedge designed to avoid entrapping due temperature changes and pipe line stress. Sealing areas of the wedge with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request. Parallel slide disc is an option for specific services as per Customer request.
  • Test in accordance with API-598.
  • Design in accordance with ASME B16.34.
  • Handwheel design made of ASTM A197 or ASTM A216 grade WCB provides more efficient transfer of loads with minimum weight. Impactor handwheel provides closing force for positive sealing against disc or back seat. Gear operator is also available for easy operation and maximum torque.
  • Thrust bearings for larger sizes minimize torque requirements and facilitate operation due the smooth forces involved.
  • Stem guide collar is designed with strong construction to prevent stem rotation; also is suitable for position indicator as per Customer request.
  • Yoke designed with two windows for easy disassembly and access to the packing chamber or bonnet retainer when maintenance is required.
  • Yoke sleeve design permit removal from from the yoke while thevalve still in service. Due the material of manufacturing ASTM A439 D2 or B148 95600 reduce coefficient of friction reducing torque operation, minimize wear and eliminate galling.
  • Stem packing system of two sacrificial packings on top and bottom of the chamber made from braided graphite; remaining rings are made from flexible graphite anti extruxion rings for low fugitive emmisions control. Optional live load packing system with extra deep stuffing box and bellevile washers is available upon request.
  • Eye Bolt Clamp design allows easy access to the packing chamber and keeps fixed loads on the stem packing regardless of bonnet position.
  • Bonnet retainer is used to help by tightening the retainer bolt/nuts to seal bonnet-bonnet gasket against body inlay.
  • Pressure seal gasket made from soft carbon steel (silver platted) or stainless steel for corrosion resistance and avoid galling. The angular relationship in between pressure seal gasket and body utilize forces generated by pressure line to increase gasket sealing effect and long life service. Graphite gasket is available upon request.
  • Bonnet encapsulated inside the upper side of the body is designed with precision machined sealing surfaces to fit against pressure seal gasket surface to utilize forces coming from line pressure to seal the complete set body-bonnet-gasket. Bonnet retains the packing system and incorporate also integral back seat system.
  • Segmented thrust ring made from hardened steel absorb all internal forces coming from the internal pressure and hold the complete set bonnet-gasket-spacer ring.
  • Spacer ring prevent deformation when pressures push the complete set bonnet-gasket against segmented thrust ring.
  • Body made from carbon steel or alloy steel are manufactured with overlay made from stainless steel in a band inside the body where contact is made in between gasket and body to improve a better seal and increase life of sealing area due provided corrosion resistance.
  • Body guide ribs hardfaced on some sizes of globe, stop check and angle globe patterns provide body guiding for disc or piston assemblies.
  • Stem with ACME thread is polished to improve low fugitive emmisions control and easy operation during opening and closing. Back seat is provided with differential angle with bonnet back seat for packing change even in service.
  • Seat ring with stellite 6 overlay for better sealing service provide wear, abrasion and erosion resistance. Seat ring is welded to the body to provide tight joint.
  • Body guided plug disc designed to avoid vibration, bending of the stem and/or misalignement during opening, closing or trhottle service. Sealing areas of the disc with stellite 6 overlay for better operation service. Other sealing surfaces materials can be provided upon request.
  • Test in accordance with API-598.