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Gate Valves

Through-conduit gate valves Type S33.6

Vexve Oy

  • Designed for full closing of working media flow
  • Compliant with API 6D standards
  • Includes accessories like drain, vent, and bypass valves
  • Very low flow resistance coefficient
  • TOP ENTRY design - possibility of refurbishment without removal from the piping system
  • Stem cover with position indicator

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Description Vendor

Through-conduit gate valves Type S33.6 are isolating valves designed for full closing of the working media flow. They are suitable for temperatures up to 200°C and are full-bore piggable valves with a flow resistance coefficient equal to that of the piping, making them ideal for long-distance pipeline systems. These valves are designed in compliance with API 6D and offer features such as 100% tightness, piggability, and a TOP ENTRY design for refurbishment without removal from the piping system. They support various working media including water, non-corrosive liquids, petroleum and petroleum products, and gas, and are available in a wide range of sizes and classes (NPS 4-48, Class 150-600). The valves are available in welded and flat designs, with flanged and welded ends, and are equipped with manual bevel gear, electric actuator, or pneumatic actuator options. They also feature a special seat design that ensures 100% tightness and allows for automatic pressure relief, along with self-sealing PTFE lip seals or O-rings for the stem.

Use Cases

  • Typically used in hydrogen and related industrial applications.

Capabilities

  • Enables full-bore flow with resistance equivalent to pipeline
  • Operates across Class 150–600 pressure ratings
  • Supports pipeline sizes NPS 4–48
  • Provides double block and bleed (DBB) functionality via seat design
  • Allows automatic pressure relief from valve body cavity to pipeline
  • Compatible with multiple actuation methods (manual, electric, pneumatic)
Vexve Oy Vexve Oy is a manufacturing company specializing in valves for energy infrastructure and is developing hydrogen-ready flow-control solutions. The company’s broader business is based on fluid-control components and application engineering, with equipment selected according to media compatibility, pressure and temperature range, leakage requirements, connection standard, actuation, and the architecture of the surrounding system. The business is mainly B2B and specification-driven, with components selected or engineered to match the operating conditions and standards of the surrounding hydrogen equipment or plant. For hydrogen, the company applies this flow-control expertise to the specific valves, regulators, fittings, manifolds, or related assemblies identified in its hydrogen offering, rather than to hydrogen production as a standalone activity. Its welded ball and butterfly valves can be adapted for hydrogen distribution and sector-coupling networks. The company brings district-energy and gas-valve manufacturing expertise to emerging hydrogen pipeline infrastructure. Within the hydrogen value chain, Vexve Oy therefore serves mainly as a component supplier to equipment OEMs, plant builders, gas-system integrators, test facilities, and infrastructure operators.
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