There are three basic sizes defined by the throat diameter and these are available with a variety of inlet and outlet connections the valves are designed and factory set to lift repeatedly within +/- 2% of the set pressure, and to re-seat above 92% of set pressure. Spring pre-compression and blow-down ring settings are lead sealed after test to inhibit unauthorised tampering, as these products are a category four-safety product.  During testing pre-delivery, flow rates at 10% above set pressure are measured to ensure compliance with stated flow capacities.

The valves can be supplied with appropriate positioned drain holes to help prevent freezing caused by water ingress, though ideally the piping should be arranged to prevent this. Complete vessel protection assemblies can be supplied comprising of two relief valves, divertor valve, bursting discs and interconnecting pipe-work

Each valve is individually calibrated and stamped with the date of manufacture, and has it’s own unique serial number prior to dispatch.

bestobell安全閥技術數(shù)據(jù)
提升止回閥尺寸包括DN6, DN10, DN15,DN20, DN25, DN40, DN50, DN 65, DN80,DN100 和 DN150；
可用于 O2, N2, Ar, CO2, He, Kr, Ne, H2,C2H4, N2O。
ISO 9001認證－設計和生產符合ASTM B31.3和BSEN 1626；
bestobell安全閥所有選材可以另行選擇BSEN 10204 3.1 / 3.2材質來源證書；  

材料

閥體                  ASTM A351 CF8M

閥帽                  ASTM A276 316

閥盤                  BSEN 12164 CW 721R

密封圈              聚四氟乙烯

閥帽墊圈           SIGMA 511

閥帽法蘭           ASTM A351 CF8M

緊固件              BS6105 A4 GR.80

閥門選擇數(shù)據(jù)

通過以下兩步來確定提升止回閥的零件編號：

1.  首先從后面的產品規(guī)格表中選擇零件代碼，“CGT--+”

2.  再從下面的表格選擇端口連接代碼。

例子：25mm的提升止回閥，BW SCH.10連接，完整的零件編號＝CGT50B1B0C。