Working condition
| Sealing Performance | Consistently meets API 598 "no visible leakage" standard |
| Service Life | 5,000 cycles/year (standard) | 50,000 cycles/year (high-performance) |
| Internal Leakage Standard | API 598 |
| Applicable Medium | Liquid, gas |
| Operating Temperature | ambient temperature~-110℃ |
| Applicable Media | Liquids & gases |
| Fire-safe & anti-static design | Support |
| Blowout-proof stem | Support |
Pain Points and Proposal
① At low temperatures, soft material valve seats (PTFE, RPTFE, PCTFE) undergo significant shrinkage, losing their sealing effectiveness and resulting in internal leakage of the valve.
② Low temperatures cause O-ring failure, resulting in internal leakage.
① Mathematical Model for Seat Contraction
● Precise mathematical formulas for thermal contraction of PTFE/RPTFE/PCTFE seat materials
● Temperature-specific compression allowances and elastic structure optimization
② O-Ring Solutions
● Reliable external-proof leakage design down to -46°C
● FEA-optimized stem extension maintains packing temperature higher than 0°C
● A dual-sealing design featuring a "lip seal with low-emission packing" is adopted to achieve low-leakage and maintenance-free operation, preventing packing failure caused by low temperature.
Only temperature insensitivity can prevent jamming.
● The unique flexible valve seat structure design is temperature-insensitive and pressure-adaptive.
● Exceptional torque consistency and manufacturing uniformity
② With strict oil, grease, and moisture removal treatments, self-pressure relief ensures safer operation
● A detachable drainage structure is separately designed at the bottom stem of the valve
● Pressure self-relief design of seat structure
Reference
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30 units for Hubei Heyuan's Hydrogen Fluoride working condition have been in continuous service for 14 months and are currently in good condition.
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112 units for Dongli Solar PV's low-temperature working condition have been in service for 18 months and are currently in good condition.