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泵阀·密封·流体输送五金

泵的采购要看扬程-流量曲线、电机等级与密封形式：同为标称1.5kW的两台泵，在实际工况点、绕组含铜量和工作制（S1连续/S2短时）上差别很大。密封件按胶料而非尺寸定价，同一图纸下 FKM、NBR、EPDM、硅胶的介质适应性完全不同。

产业带

浙江温岭/台州——小型水泵与泵体总成主产区；安徽肥东——工程与工业泵；浙江宁波慈溪——密封件、软管与流体五金

典型产品

Centrifugal / multistage pumpSubmersible drainage & sewage pumpGear / diaphragm pumpMechanical seal cartridgeO-ring & gasket setsSolenoid & micro pump

材质

Cast iron HT250Brass / bronzeSS 304 / 316 wetted partsNBR / FKM / EPDM / silicone / PTFE

表面工艺

Epoxy paintedElectro-depositedStainless passivated

报价会引用的标准

ISO 9906 (pump test code Grade 2/3)EN 12162 (brass)IEC 60034 motor class, IP ratingFDA / WRAS material compliance only if certified

规格参考表

参数项	需要约定的内容
Duty	Head 5–80 m, flow 1–40 m³/h typical for small pumps
Motor	Copper winding declared, IP44/IP55/IP68, Class F insulation, S1 duty
Seal type	Mechanical seal (carbon/ceramic/NBR) vs packed gland
Elastomer	NBR oil, FKM fuel/high-temp, EPDM steam/water, silicone food-grade
Test	Performance curve per model; leak/insulation test per unit
Power	0.37–7.5 kW common; single/three-phase declared per destination grid

常规起订量：50–200 pcs for OEM-labelled pumps; seals typically 1,000–5,000 pcs per size; moulded rubber 3,000 pcs (tooling applies)；常规交期：30–45 days for pumps incl. motor sourcing。

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买家常见问题

What should a pump purchase order pin down to avoid disputes?

The duty point (head and flow together), motor winding material, insulation class, IP rating, duty rating S1/S2, wetted-part alloy, seal type, and the test standard (ISO 9906 grade). Those six items are where cheap pumps usually differ while still matching the catalogue.

Which rubber should my seals be for hot water or fuel?

NBR suits oils and fuels but not hot water; EPDM suits hot water, steam and glycol but fails in oil and fuel; FKM covers fuels and higher temperatures at higher cost. Choosing by medium rather than by durometer is the single most common fix in seal claims.