Spring-loaded safety valve performance parameters (GB12241) Medium (use) Performance parameters Liquid medium (container equipment) Gas medium (container equipment) Steam-powered boilers DC boilers, reheaters and other steam equipment Set pressure deviation δ P s Ps < 0.5 MPa, δ Ps is ± 3 Ps ± 0.5 Ps ± 0.5 MPa, Ps is ± 0.0 Ps is ± 0.0 Ps is ± 0.0 Ps is ± 0.5 Pm is ± 3 Ps is 0.5 P / ΔPs at 7.0MPa ± 0.07 Ps> 7.0MPa δPs is ± 1 Ps Discharge pressure P dr 1.2 × Ps 1.1 × Ps 1.03 × Ps Opening and closing pressure difference △ Pbl Ps ≤ 0.3MPa Δ Pbl ≤ 0.06 Ps ≤ 0.2 MPa Δ Pbl ≤ 0.03 Ps ≤ 0.4 MPa Δ Pbl ≤ 0.03 Ps ≤ 0.4 MPa Δ Pbl ≤ 0.04 Δ Pbl ≤ 20 for Ps> 0.3 MPa Δ Pbl ≤ Ps Ps> 0.4 MPa, ΔPbl ≤ 7 Ps Ps> 0.4 MPa, ΔPbl ≤ 10 Ps Ordering please specify the set pressure range or set pressure MPa Nominal pressure MPa Set pressure range MPa 1.6 0.06 ~ 0.1 0.1 ~ 0. 16 0.16 to 0.25 0.25 to 0.4 0.4 to 0.6 0.6 to 0.8 0.8 to 1.0 1.0 to 1.3 1.3 to 1.6 2.5 1.3 to 1.6 1.6 to 2.0 2.0 to 2.5 4.0 1.3 to 1.6 1.6 to 2.0 2.0 to 2.5 2.5 to 3.2 3.2 to 4.0 6.4 2.5 To 3.2 3.2 to 4.0 4.0 to 5.0 5.0 to 6.4 10.0 4.0 to 5.0 5.0 to 6.4 6.4 to 8.0 8.0 to 10.0 16.0 10 to 13 13 to 16 32.0 16 to 19 19 to 22 22 to 25 25 to 29 29 to 32 Spring- the main parts of material of the valve body material code part names CIPVR body, bonnet WCB ZGCr5M 0 ZG1Cr18Ni9Ti ZG12CrMoV 1Cr18Ni12Mo2Ti flap stem 2Cr13 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18N12Mo2T guide sleeve, the recoil spiral 2Cr13 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18N12Mo2T cobalt-based alloy material of the sealing surface Cobalt-based alloys Cobalt-based alloys Cobalt-based alloys Cobalt-based alloy springs 50CrVA 50CrVA 50CrVA (coated fluoroplastic) 50CrVA 50CrVA (coated fluoroplastic) Medium (use) Performance parameters Liquid medium (Container equipment) Gas medium (container equipment) Steam-driven boilers DC boiler, reheater and other steam equipment Setting pressure deviation δ Ps Ps <0.5MPa, δ Ps is ± 0.014 Ps ≥ 0.5MPa, δ Ps is ± 3 Ps was ± 0.014 for Ps Ps <0.5 MPa, Ps was ± 3 for Ps <0.5 to 2.3 MPa, Ps was ± 0.07 for Ps Ps = 2.3 to 7.0 MPa, Ps was ± 1 for Ps> 7.0 MPa, Ps Discharge pressure P dr 1.2 × Ps 1.1 × Ps 1.03 × Ps Opening and closing pressure difference △ Pbl Ps ≤ 0.3MPa Δ Pbl ≤ 0.06 Ps ≤ 0.2 MPa Δ Pbl ≤ 0.03 Ps ≤ 0.4 MPa Δ Pbl ≤ 0.03 Δ Pbl ≤ 7 Ps Ps> 0.4 MPa for Δ Pbl ≤ 20 MPa for Ps ≤ 0.4 MPa and Δ Pbl ≤ 20 for Δ Pbl ≤ 20 MPa for Ps> 0.3 MPa for Δ Pbl ≤ 15 Ps for Ps> 0.4 MPa Δ Pbl ≤ 10? Ps Nominal pressure MPa Setting pressure range MPa 1.6 0.06 ~ 0.1 0.1 ~ 0.16 0.16 ~ 0.25 0.25 ~ 0.4 0.4 ~ 0.6 0.6 ~ 0.8 0.8 ~ 1.0 1.0 ~ 1.3 1.3 ~ 1.6 2.5 1.3 ~ 1.6 1.6 ~ 2.0 2.0 ~ 2.5 4.0 1.3 ~ 1.6 1.6 ~ 2.0 2.0 ~ 2.5 2.5 ~ 3.2 3.2 ~ 4.0 6.4 2.5 ~ 3.2 3.2 ~ 4.0 4.0 ~ 5.0 5.0 ~ 6.4 10.0 4.0 ~ 5.0 5.0 ~ 6.4 6.4 ~ 8.0 8.0 ~ 10.0 16.0 10 ~ 13 13 ~ 16 32.0 16 ~ 19 19 ~ 22 22 ~ 25 25 ~ 29 29 ~ 32 Part Name Body Material Code CIPVR Body, bonnet WCB ZGCr5M 0 ZG1Cr18Ni9Ti ZG12CrMoV 1Cr18Ni12Mo2Ti Disc, stem 2Cr13 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18N12Mo2T Guide sleeve, recoil plate 2Cr13 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18N12Mo2T Sealing surface materials Cobalt-based alloys Cobalt-based alloys Cobalt-based alloys Cobalt-based alloys Cobalt-based alloy springs 50CrVA 50CrVA 50CrVA (coated fluorine plastic) 50CrVA 50CrVA (coated fluorine plastic)
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