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Company profile

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

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.

API6A casing head T-seals

T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.

T-Seals for casing head

T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.

Casing secondary BT seal

BT Seal is a static seal that is used to seal rough casing and tubing. It is constructed from an elastomer with anti-extrusion spring bonded within it. Springs are available in stainless steel, elastomer could be HNBR or NBR.

Standard size hammer union seal

Hammer Union Seals are used in hammer union-style pipe connections to establish flow lines and prevent leakage. It is widely used in the oil & gas industry.

High pressure swivel joint ball plug

Swivel joint ball plug is working together with hammer union seals, to seal the balls of high pressure elbows and grease.

Well service plunger pump packing

JST manufactures well service plunger pump packings in a wide variety of materials to suit specific well conditions and operating parameters, they are available in a wide range of elastomeric materials and high performance resins, including NBR, HNBR, FKM, filled PTFE, fabric reinforced rubber. to suit specific well conditions, operating parameters, and fracturing fluids.

Valve insert seal for frac pump

The JST valve insert seal is mainly used for sealing valve seat of fracturing pump. It is made of modified polyurethane material of excellent extrusion resistance, puncture resistance and fatigue resistance, which guarantees the fracturing work under various working conditions.

Rapid Gas Decompression O ring

JST's RGD (Rapid Gas Decompression) o ring can be applicated in high and low temperature environment with high pressure. It is widely used in detection and drilling equipment, completion equipment,underwater valves and pumps, compressor ect.

Packer element for downhole application

JST's Packer elements are flexible elastomeric components that are used to seal between the outside diameter of the production tubing and the casing, liner or wellbore.

Well completion liner wiper plug

Liner Wiper Plugs separates drilling fluid from cement during displacement.

Downhole pump down plug (PDPC)

Pumpdown plugs separate cement from the displacement fluid during liner cementing operations.

Bonded seals for downhole tool

The bonded seal is used in work-over and sand control operations. With the bonding of elastomer to a steel core, this serve to prevent excessive rubber compression under loading.

MEC Metal end cap seal

JST's metal end cap seal is elastomer bonded onto 2 steel caps. This provides high level of extrusion resistance.

HNBR S seal for downhole application

S Seals are well suited for sealing wellheads, connectors, downhole tools, high pressure valves and other demanding oil and gas applications. The non-extrusion springs can be fabricated from different metals. The S seal is made of spring and rubber material could be NBR, HNBR, FKM ect.

PEEK V stacks for downhole tool

The V Stack seal assembly is comprising a top adapter or anti-extrusion ring (1), Vee Rings (2) and a bottom adapter (3).In the assembly the energizing axial force is transferred between the individual packing rings so that each ring is pressed into positive contact with the mating hardware surface. Special material grades are available for a large variety of working conditions. The seal stack material could be PEEK, modified PTFE and spring.

Downhole PEEK back-up rings

JST's back up ring compensate for large temperature fluctuations. Using Back-up Rings allows O-Rings to be utilized in higher pressure applications, where larger extrusion gaps are required and where there are reciprocating or rotating movements. Back-up Rings are protective and supporting elements with no sealing function. The back up ring material could be PEEK, modified PTFE.

Downhole MWD centralizer rubber fins

JST's centralizer rubber fins is made according to customer requirements. The centralizer fin has a retrievable, reseatable, flexible design. This Rubber and metal reinforced rubber centralizer fins are available for a variety of MWD (measurement while drilling) tools and oil well logging and monitoring instruments.

BOP inner and outer seal

JST's Inner and Outer BOP Seals could be made according to customer requirements. These seals are used in various type of Blow Out Preventors (BOP's).

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