1, JB/T7371-1994 pump with mechanical seal "resistance" this standard applies to alkali centrifugal pump with mechanical seal, divided into three basic types: 167 (1105) — double face, multi spring, unbalanced type; type 168 — exterior, single face, single spring, PTFE bellows type — type 169; exterior, single face, multiple springs, PTFE bellows.

The working parameters of sealing medium pressure 0~0.5MPa; sealing medium temperature is not higher than 130 DEG C; the speed is not greater than 3000r/min; 107 shaft type 28~85mm, 168 type 30~45mm, 169 type 30~60mm; medium for sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, calcium carbonate, potassium carbonate and alkaline liquid, wherein the caustic concentration is less than 42% the content of solid particles is less than 20%.

2, JB/T1472-1994 "mechanical seal for chemical pump", the standard is suitable for rotating mechanical seals and other mechanical seals similar to the rotating shaft. Pump mechanical seal consists of 103 type, B103 type, B104 type, type 104, type 105, B105 type 114, type seven basic forms and 104 type (GX type), B104 type (GY type), 114 type three derivative forms. The structure and working parameters of the mechanical seal of the pump are shown in table 5-36. 5-36, the form and working parameters of the mechanical seal of the pump are listed in table 5-36. 1. The medium with large viscosity and good lubricity is taken from 0.6~3, and the medium with small viscosity and poor lubrication is taken as the medium.

3, "JB/T8723-2008 welded metal bellows mechanical seal" this standard is suitable for centrifugal pumps and similar mechanical rotary shaft welded metal tube mechanical seal, shaft diameter scope is: Ping 20mm~120mm; seal chamber temperature is -40~400 DEG C; the pressure in the seal cavity, single ≤ 2.2MPa, 4.2MPa; &le double bellows; speed rotary type face average speed, ≤ 25m/s, static type face average speed of ≤ 50m/s; medium, water, oil, solvent and rot 5— the working parameters of 39 acid corrosive liquid pump with mechanical seal.

4, "JB/T7372-1994 mechanical seal" acid pump of this standard is suitable for acid pump with mechanical seal, divided into four basic types: 151 — — exterior, single face, single spring, PTFE bellows type 152; — — exterior, single face, multiple springs, PTFE ethylene bellows type 153; — — interior decoration, internal flow, single face, multiple springs, PTFE bellows type 154; — — interior decoration, internal flow, single face, single spring, unbalanced type.

In addition to four basic forms, there are three derived forms of 152A, 153a, and 154A.

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