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GKV134D/GKV225D Cryogenic Ball Valves – Floating & Trunnion Mounted are designed with extended bonnets and high-performance sealing systems to ensure safe, leak-free operation at extremely low temperatures. Engineered and tested for demanding cryogenic services, these valves deliver long-term reliability in LNG plants, air separation units, liquid oxygen and nitrogen storage, hydrogen applications, and other industrial processes requiring precise control of cryogenic fluids.
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GKV Cryogenic Ball Valve – Floating & Trunnion Mounted, Low-Temperature Performance |
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Size range DN15 to DN1000 (½" to 40"), custom sizes available
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Body & Bonnet Material A350 LF2, LCB, LCC, CF8, CF8M (304L/316L), CF3, CF3M |
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Temperature range -196°C to +80°C (-321°F to +176°F)
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Ball / Stem Material 304 / 316 / CF8M stainless steel, Inconel, Monel, optionally low-friction or hardened coating
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Maximum Allowable Working Pressure ANSI / ASME Class 150 – 2500 (depends on size and material) |
Seats & Seals Cryogenic-grade PTFE, PCTFE, reinforced PTFE (RPTFE), or metal-to-metal seals |
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Stem Packing PTFE / Graphite composite, low-temperature resistant, optional bellows packing |
Operation Method Manual (Handwheel / Gear), Pneumatic, Electric Actuated |
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Special / Optional Materials Super Duplex, Inconel, Monel, special cryogenic alloys for corrosive fluids or extreme low temperatures |
End Connection Standards Flanged: ASME B16.5 / EN1092 |
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Design Standards ASME B16.34, API 608, BS 6364 / ISO 14313
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Applications LNG storage, transfer, industrial and specialty gas pipelines, cryogenic chemical processing, low-temperature fluid control
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Testing & Inspection Pressure & Leakage Test: API 598 / ISO 5208 |
Key Highlights Leak-tight at -196°C, long service life, low maintenance, low operating torque, safe for cryogenic fluids, modular & lightweight
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FIRE SAFE TO API 607, BS 6755
- Body gasket SS 316 and graphite (standard).
- Ball seats on body edge.
- Stem shoulder seats on body.
DESIGN FEATURES:
- Meets ASME B16.5,ASME B16.34, API 608, API 598.
- Face-to-face dimensions meet ASME B16.10 long pattern.
- Memory Seal seats compensate automatically for wear and fluctuations
of pressure and temperature.
Long cycle life.
Low torques.
Blowout-proof stem.
Stem bearing reduces side thrust.
- Multiple solid PTFE or chevron type stem seal (adjustable).
- Live-loaded thrust washer prevents galling and provide secondary stem seal.
- Fully enclosed spiral wound graphite filled stainless body gasket.
- Air vent on all balls.

Blowout-Proof One-Piece Stem
GEKO' s CRY line of cryogenic valves utilize a one-piece stem that
engages the ball and is secured in the valve cavity with a large, threaded
stem collar that is set-screwed for safety.
A retaining ring threads to the bottom of the stem, which resists from
blowing out.
Once the retaining ring is threaded to the bottom of the stem,
it is set-screwed in place to prevent rotation
Stem Seal Design
The valve's stem sealing capability is further enhanced by a welded bonnet
design and V-ring packing that can be adjusted by a simple turn of the stem
nut.The rings of the PTFE V-ring or graph oil packing, which sit on a shoulder
machined on the stem.This allows the packing and stem to move asa unit
during thermal cycles.In addition, the packing is live-loaded, retained by self
compensating Belleville spring washers, and a packing adjustment nut.These
features coupled with close tolerance machining and finish of the packing bore,
provide long stem seal life with reduced maintenance.