A21H, A21F, A21W PN16~PN40 spring micro-opening safety valve

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. No Information

Main performance parameters

model	Nominal pressure PN	Applicable temperature /°C	Applicable medium
A21H/F-16C~40	10~40	≤200	Liquid, air
A21W/F-16P~40P	10~40	≤200	Weak corrosive liquid, gas
A21W/F-16R~40R	10~40	≤200	Corrosive liquids and gases

Main overall dimensions

                                                          （unit：mm）