Pump Type Standard Specification Metering Pumps and Reciprocating Pumps GB / T7782-2008 Metering Pump GB / T Motorized Reciprocating Pump Rotor Pump SH / T3151-2007 Petroleum and Chemical Rotor Pump Engineering Technical Regulations APl676,3, 2009Positive DisplacementPumps-Rotary Liquid Ring Vacuum Pump APl681, 1st, 1996LiquidRingVacuumPumpsandCompressorsforPetroleum, Chemical, AndGasIndustryServices pump seal SH / T3156--2008 petrochemical centrifugal pump and rotor pump shaft seal system engineering specifications APl682, 3m, 2004Pumps-ShaftSealingSystemsforCentrifugalandRotaryPumps different standards of the pump, the price and reliability than Big difference. In addition to the owners or patent agents specifically designated, should be based on device characteristics and working conditions to choose a reasonable standard, so that both economical and practical requirements to meet the installation and working conditions. Industrial centrifugal pump standard selection criteria Table Conditions l exceeds the following parameters of the occasion: suction pressure ≤ 0.5MPa (G), discharge pressure ≤ 1.9MPa (G), the media temperature conditions 2 occasions when pumping hazardous substances pumped Conditions 3 Pumping toxic hazard media conditions 4 Pumps without equipment, and the reliability of the pump requires a high condition 5 The owner or the patent holder to specify the occasion to be used heavy-duty centrifugal pump criteria (1) meet the conditions l, or condition 2, or condition 3, or condition 4, or condition 5, should choose heavy duty centrifugal pump standard, namely "SH / T3139 + APl610" (2) In addition, in order to reduce equipment procurement costs, should be used in SH / T3140 + IS05199 "or" SH / T3140 + GB / T5656 "or" SH / T3140 + ASMEB73.1M / B73.2M "