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**閥技術(shù)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(rèn)證－設(shè)計(jì)和生產(chǎn)符合ASTM B31.3和BSEN 1626；
bestobell**閥所有選材可以另行選擇BSEN 10204 3.1 / 3.2材質(zhì)來源證書；
bestobell**閥材料
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(chǎn)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。
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