Air A21F, A21H-C-type spring inching external thread safety valve A21F, A21H-C-type spring inching external thread safety valve is suitable for the working temperature ≤ 200 ℃, ammonia, liquefied petroleum gas (LPG) and other media equipment or pipe road. A21W-P, R type suitable for temperatures ≤ 200 ℃ corrosive gas or liquid equipment or pipeline, as overpressure protection device. KA21Y type suitable for LPG temperature ≤ 100 ℃. I. Overview Brand: giant Bo Material: Stainless Steel Model: A21F, A21H-C form of connection: welding Applicable medium: air, water, nominal diameter: DN15-DN25 (mm) structure: Other pressure environment: atmospheric temperature: room temperature the standard: GB flow direction: one-way drive mode: automatically morphology: other two main parts materials NO A21, Threaded parts the name A21H-C/A21F material A21W-P/A21F-P material A21Y-R material a connector 2 tube fittings nut 20 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 35 2Cr13 1Cr18Ni9Ti 3 seat 35 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 4 Body 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 5 valve flap 2Cr13/2Cr13 + the PTFE 1Cr18Ni9Ti/1Cr18Ni9Ti + PTFE 1Cr18Ni12Mo2Ti 6 spring seat 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti spring 50CrVA 50CrVA is coated with fluorine plastic 50CrVA coated fluorine plastic locknut Q235-A ZG230-450 1Cr18Ni9Ti 9 spring guide pad adjusting nut 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti 10 Q235-A 2Cr13 1Cr18Ni12Mo2Ti sealing surface material "Y"-type surfacing Co based cemented carbide, "H" type surfacing D507 "W"-type valve body, male external thread dimensions and connection size Model A21 that path do d Do M d1 D1 L L1 ≈ H 15 12 15 20 M27 x 1.5 G1 / 2 "30 35 76 66 20 16 20 25 M33 × 1.5 G3 / 4 "35 40 87 68 25 18 25 31 M39 × 1.5 G1" 40 50 100 105 15 10 15 25 M39 × 1.5 G1 "44 50 100 66 20 10 20 31 M39 × 1.5 G1 "44 50 100 68 25 12 25 31 M39 × 1.5 G1" 44 50 100 105 15 8 20 / M24 × 2 G1 "44 50 100 261 20 8 25 / M33 × 2 G1" 44 50 100 261 25 8 28 / M36 × 2 G1 "44 50 100 285 Ordering Information: ① A21F, A21H-C-type spring inching external thread safety valve role Product Name and Model ② The A21F, A21H-C-type spring inching external thread safety valve role caliber ③ A21F, A21H -C-type spring inching external thread safety valve role with attachments, so that we can correct selection for you. two design units selected the giant Bo valve company A21F, A21H-C-type spring inching external thread a safety valve role models, A21F, A21H-C-type spring the inching outside threaded safety valve role directly to our Sales Department Order., when the use of the occasion is very important or more complex environment, you try to provide design drawings audit checks and detailed parameters for you by our giant Bo valve experts. thank you for visiting our site, if you have any questions you can call us and we will try our best to provide you with quality service.