A21F, A21H spring micro-open type external thread safety valve is suitable for working temperature ≤200℃ air, ammonia, LPG...... Such as medium equipment or pipeline. A21w-p, R stainless steel spring micro-open external thread safety valve is suitable for corrosive gas or liquid temperature ≤200℃ equipment or pipeline, as overpressure protection device. KA21Y spring micro-open external thread antisulfur safety valve is suitable for LPG temperature ≤100℃.
Scope of use: the product can be used in petroleum, chemical, electric power and other industries.
The product conforms to standard: ASME Ⅷ, API 527.
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