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JST has passed ISO9001 quality management system certification, API Q1 system certification and HSE system certification. JST is dedicated to innovation, and has developed over 40 patented products and counting.

All products

PU pneumatic rod seal EU

Rod seals are external seals that prevent leakage from the cylinder. EU rod seal for piston rods in pneumatic cylinders combines three functions: sealing-wiping-fixing.

Hydraulic rod PTFE SPNS step seal

Rod seals are static seals installed in glands or housings to prevent the leakage of fluid from within a cylinder to the outside as the rod cycles.

Hydraulic D2 piston polyurethane seal

Piston seals are work to seal in fluid, thus preventing the flow of fluid across the piston, allowing pressure to build up on one side of the piston.

UNS UHS piston rod seal

UNS UHS is a lip-seal which can be used for both piston and rod .

Hydraulic piston PTFE SPGO seal

SPGO is a low friction piston seal consisting of PTFE+Bronze seal ring and rubber o-ring used for two-way piston seal of Hydraulic cylinder, to seal in fluid, thus preventing the flow of fluid across the piston, allowing pressure to build up on one side of the piston.

Hydraulic piston PTFE SPGW seal

SPGW is a high performance, double acting compact piston seal, to seal in fluid, thus preventing the flow of fluid across the piston, allowing pressure to build up on one side of the piston.

Double acting PTFE piston seals

XTP is Double acting piston seals, composed of PTFE piston sealing ring, O-ring and X ring, and is used for the piston bidirectional seal of hydraulic cylinder. Especially suitable for separating two different mediums.

Hydraulic HBY PU buffer seal

Piston seals are working to seal in fluid, thus preventing the flow of fluid across the piston, allowing pressure to build up on one side of the piston.

Hydraulic ODU piston PU seal

ODU Piston seals are work to seal in fluid, thus preventing the flow of fluid across the piston, allowing pressure to build up on one side of the piston.

PTFE guide and wear strip

Guide and wear strips can keep the piston centered as well as preventing metal-to-metal contact.

Hydraulic cylinder PTFE wear ring

Wear rings are used to help keep the piston centered, allowing for even wear and pressure distribution on the seals. Wear rings are used in both piston and rod applications.

Hydraulic cylinder PTFE seal KZT

KZT is used in combination with anti-wear and piston ring to prevent cylinder oil from mixing with foreign particles, avoiding seal damage.

Hydraulic PTFE wiper seal

Wipers are installed in the sealing configurations of hydraulic cylinders to prevent contaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system.

Hydraulic DLI wiper seal

DLI is a dust resistance and oil-scraping double acting seal. Consist of PU and iron material.

Hydraulic DKBI wiper seal

DKBI wipers are installed in the sealing configurations of hydraulic cylinders to prevent contaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system.

NBR HNBR PU wiper seal

Wipers are installed in the sealing configurations of hydraulic cylinders to prevent contaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system.

NBR HNBR FKM PTFE O ring

O ring is a type of seals with solid rubber material or PTFE and an O-shaped cross section.

V-Stack Seal Assembly for oil & gas

V-Packings are used in various Oilfield Downhole equipment such as various Valves etc. V-Packings are extremely suitable for usage in medium to heavy duty applications. Vee Packings accept low and high pressure while operating in the most extreme conditions and also if there exists any misalignment between the sealing gaps.

Hydraulic rubber fabric V packing seal

V Packing consist of multiple male and female adaptor, usually a group of three to seven v rings, used for low or high pressure applications with Single or Double acting cylinder.

PEEK PTFE POM back up ring

Back-up Ring/Anti Extrusion Rings is a ring that holds an elastomeric seal to its outline shape and in its right place. and are typically used with O Rings to eliminate extrusion at high pressures.

Spring energized PTFE lip seal

Spring energized PTFE seals consist of variety of jacket profiles and spring types. It can achieve the sealing effect compensation under different pressure conditions by spring energizer.

High pressure rotary lip seals

High-pressure Rotary Seals is one bidirectional rotary seal which can bear both sides of pressure and alternating pressure. It is made with slip ring and o-ring/square ring.

Spring energized ball valve seal

JST FHR series is made of a helical wound spring and a polymer jacket, which is mainly used for rod.

API6D trunnion mounted ball valve lip seals

The FHC seal is made of a helical wound spring and a polymer jacket, which is mainly used as a Flange outer face seal.

API 6D ball valve piston seal

JST FHP series is made of a helical wound spring and a polymer jacket, which is mainly used for piston.

Ball valve high pressure lip seal

The BVR series is made of a canted level spring and a polymer jacket, which is mainly used as a stem seal.

Cryogenic ball valve stem seal

In LNG operations, valves can regularly encounter temperatures below -320 F (-196 C) and pressures above 750 pounds per square inch (psi). They are also subjected to periodic variations in temperatures known as “thermal cycling,” which can result in hardware expansion as well as shrinkage and material stresses. These factors make reliable, long-term valve operation an engineering challenge.

Gate valve rubber polypak seal

The ESA valve rubber seal is a type of Polypak, it combines a rubber o-ring type and a conventional lip type seal to produce a unique sealing device.

PTFE gate valve seat seal

The PTFE gate valve seat seal is made of durable teflon, it is compatible with the Cameron gate valve type FC, FLS, and used in rotating equipment to minimize o-ring movement.

Stem U packing for type FC gate valve

JST's ESU series stem packings, also known as u packing, are designed to be placed between the stem and bonnet of Type FC gate valves. This stem packing gives you a reliable seal for superior performance.

PTFE Spring energized valve stem packing

Spring energized valve stem packing contributes to the overall performance of industrial operations. They serve the vital task of keeping oil and liquids in while keeping contaminants out.

Gate valve stem packing assembly

Spring energized valve stem packing contributes to the overall performance of industrial operations. They serve the vital task of keeping oil and liquids in while keeping contaminants out.

Gate valve stem packing seal

Spring energized valve stem packing contributes to the overall performance of industrial operations. They serve the vital task of keeping oil and liquids in while keeping contaminants out.

PEEK OFS ID face seal

ID Face Seal for Cameron Type FLS Gate Valves, are spring-loaded, pressure-energized lip seal that improve gate and seat service life for all Cameron style FLS gate valves.

PEEK OFS OD face seal

OD Face Seal are 100% compatible with Cameron Type FLS and FLS-R Gate Valves, It is spring-loaded and pressure-energized to improve gate and seat service life.

FLS valve spring energized face seal

It is an end face spring energized seal with both rigid and flexible elements, which gives consistent contact at the sealing interface.

Lockdown screw packing for casing head

Lockdown screw seal is sed mainly in geothermal applications, HNBR packing with stainless steel caps provide superior performance over metal pressure seals.

S seal for casing head and tubing hanger

S seal is a technologically advanced replacement for traditional three-piece T-Seals or O-Rings with back-ups.

P seal for casing and tubing

P seal is constructed from an elastomer with back up rings for anti-extrusion. Energized by the injection of sealant, it is a static seal that is used to seal rough casing and tubing. Backup rings are available in Mesh Stainless Steel or Solid Carbon Steel.

Casing head and tubing hanger FS seal

The FS-seal is a relatively large cross section spring energized elastomer casing and tubing hanger seal for wellheads that always has the springs on the internal surface.

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