JST Seals

  Open groove The open groove structure is the most recommended groove form. The open groove structure is a separate two-piece design. The  lip seal  does not need to be stretched or twisted for assembly.(Fig:4-1) Typical features: The lip seal does not need to be stretched or twisted for assembly. Lip seal can be disassembled and assembled repeatedly without causing damage to it. Two-piece structure groove type may increase manufacturing costs. Stepped groove The stepped groove is a one-piece step design. The step is to keep the sealing ring in the groove. The height of the step is very small and no installation tools are required. The lip seal can be easily pushed into the groove. For  piston sealing , Stepped groove is a good structure. Stepped grooves are not a good choice when there is back pressure. (Fig 4-2) Closed groove The closed groove is a one-piece integral design and is not recommended. It is only suitable for certain seal diameters, which requires stre...

  The   valve stem packing assembly   refers to the sealing components used to prevent leaks from the stem of a valve.   Valve stem packing   plays a vital role in ensuring a long valve life. JST  EST valve stem packing  has good sealing performance under working pressure and a certain temperature range, and can automatically improve the sealing performance with the increase of pressure, which is suitable for type FLS and FLS-R gate valves. This seal has passed the PR2 tests. They are built to meet the American Petroleum Institute’s high standards for design, materials, function and performance. Advantages: 1. The sealing ring has strong anti-corrosion ability, is not easy to aging. 2. Has long working life and good wear resistance, and can be automatically compensated to a certain extent after wear. Material: PEEK, Elgiloy/SS steel, Filled PTFE https://www.jst-seals.com/valve-stem-packing-for-fls-r-gate-valves_p85.html

  A   hammer union seal   used in hammer unions, some customer also called it   weco seals   which are widely used in the   oil  and gas industry   for connecting pipes or valves together temporarily. These unions are designed to provide a quick and reliable connection that can withstand high pressure and harsh conditions commonly found in drilling operations. The seal in a hammer union typically consists of a combination of materials, such as NBR or HNBR and sometimes metal rings like stainless steel or brass. When the two halves of the union are hammered together, the seal is compressed between the male and female parts, creating a tight and secure connection. This seal prevents leakage of fluids or gases under high pressure. JST factory developed different material to suit for hostile working condition such as H2S, CO2, CH4. Hammer union seals or pressure manifold seals are key components in ensuring safety of piping systems in oil and gas oper...

PDR rotary shaft seal   extends the boundaries of   elastomeric radial shaft seals , utilizing advanced materials and design techniques to provide optimal sealing performance for each application. The result is a superior sealing solution that retains a compact sealed casing. Due to the inherent limitations of various elastomer grades, the application range of standard elastomer rotary shaft seals is limited in terms of temperature, surface velocity, medium compatibility, pressure, or a combination of these factors. In addition, they have limited applicability only for applications with insufficient lubrication. The characteristics of PDR rotary shaft seals, especially low friction and stick-slip-free operation, reduce temperature generation and allow for higher circumferential speeds. PTFE has inherent memory properties, so deformed PTFE components will attempt to recover the contours of their manufactured sintering cycles. General Description PDR seal consists of only two pa...