Specifications and models of chlorine valves

It is made of low-temperature steel; for globe valves, the male/female connection type should be indicated as FM or M.

J41F J is a globe valve; 4 denotes flange connection; 1 indicates straight-through type; F refers to the fluoroplastic sealing surface; Lower denotes lower sealing

Original poster, take a look to see if it’s helpful to you. This standard applies to gate valves, globe valves, ball valves, butterfly valves, diaphragm valves, check valves, safety valves, pressure relief valves, steam traps, plug valves, and piston valves used in industrial pipelines. 1. The method for coding valve models is as follows: 2. The type code is represented by Pinyin letters. Table 1 shows the type codes: Gate valve – Z; Plug valve – X; Globe valve – J; Check valve and foot valve – H; Throttle valve – L; Safety valve – A; Ball valve – Q; Pressure reducing valve – Y; Butterfly valve – D; Trap – S; Diaphragm valve – G; Plunger valve – U. Note: For valves designed for low temperatures (below -40 degrees Celsius), those with insulation (equipped with a heating layer), and those equipped with bellows, the Pinyin letters “D”, “B”, and “W” are added in front of the type code respectively. 3. The code for the transmission method is represented by Arabic numerals. Table 2 shows the codes for various transmission methods: Electromagnetic drive – 0; Bevel gear – 5; Electromagnetic-hydraulic drive – 1; Pneumatic drive – 6; Electro-hydraulic drive – 2; Hydraulic drive – 7; Worm gear – 3; Pneumatic-hydraulic drive – 8; Spur gear – 4; Electric drive – 9. Note: (1) Codes for manual operation via handwheels, levers, and wrenches, as well as for safety valves, pressure relief valves, and steam traps, are not included here. (2) For pneumatic or hydraulic types: normally open types are denoted by 6K and 7K ； Normally closed is indicated by 6B and 7B ； Pneumatic with manual operation is indicated by 6S, while explosion-proof electric types are indicated by “9B”. A worm-T-nut is denoted by 3T. 4. The connection type code is represented by Arabic numerals. Table 3 Connection types – Codes. Connection types – Codes: Internal thread 1, Clamp type 7; External thread 2, Clamp band type 8; Flange type 4, Collar type 9; Welded type 6. 5. The codes for structural types are represented by Arabic numerals. Table 4 Structural types of gate valves – Codes: Open stem, Wedge type, Elastic gate plate 0; Rigid single gate plate, Double gate plate 1, 2; Parallel type, Single gate plate, Double gate plate 3, 4; Closed stem wedge type, Single gate plate, Double gate plate 5, 6; Closed stem parallel type, Double gate plate 8. For example, Z941T-16 denotes an electric gate valve ； Flange connection with visible stem, copper alloy sealing surface, nominal pressure of 1.6 MPa; valve body material is gray cast iron (the letter Z is omitted). Table 5 shows the structures of globe valves and throttle valves. Open type codes: straight-through type – 1; angle type – 4; straight-through parallel type – 5; angle type – 6; 7. For example, J41H-25C denotes a manual globe valve (the code for manual operation via handwheel is omitted) ； Flange connection, straight-through type, alloy steel sealing surface, nominal pressure of 2.5 MPa; valve body material: WCB (cast steel). Table 6: Ball valve structure types – Code: Floating, straight-through type: 1; L-shaped, three-way type: 4; T-shaped: 5; four-way type: 6; Fixed, straight-through type: 7. For example, 641F-40P denotes a pneumatic ball valve ； Flange connection, straight-through type, fluoroplastic sealing surface, nominal pressure of 4.0 MPa. Valve body material: 1Cr18Ni9Ti (stainless steel, equivalent to 304). Table 7: Structure types of butterfly valves. Codes: Lever type – 0; Vertical plate type – 1; Diagonal plate type – 2 (our company uses the triple-eccentric type). Note: The vertical plate triple-lever type is denoted as Is. For example, 371X-10Q refers to a worm gear-driven butterfly valve ； Clamped connection, vertical plate type, rubber sealing surface, nominal pressure of 1.0 MPa; valve body made of ductile iron. Table 8: Structure types of diaphragm valves – Code: Plug type 1, Globe type 3, Gate type 7. Table 9: Structure types of plug valves – Code: Packing type; Straight-through type 3, T-shaped tee type 4, Four-way type 5; Oil seal type: Straight-through type 7, T-shaped tee type 8. Table 10: Structure types of check valves and foot valves – Code: Lift type, Straight-through type 1, Vertical type 2; Swing type: Single-disc type 4, Multi-disc type 5, Double-disc type 6, Butterfly type 7. Table 11: Structure types of safety valves – Code: Spring type; Closed type, with radiators; Fully open type 0, Slightly open type 1, Fully open type 2, With wrench, fully open type 4, Dual-spring slightly open type 3, Not closed, slightly open type 7, Fully open type 8, With control mechanism, slightly open type 5, Fully open type 6, Pulse type 9. Note: (1) For lever-type safety valves, the Chinese pinyin letter “G” is added before the type code. (2) The pulse-type delivery valve is denoted by 9a. Table 12: Structural types of pressure relief valves – Codes: Diaphragm type: 1; Spring-diaphragm type: 2; Piston type: 3; Bellows type: 4; Lever type: 5. Table 13: Structural types of water-repellent valves – Codes: Float type: 1; Bell-shaped float type: 5; Bimetallic type: 7; Pulse type: 8; Thermodynamic type: 9. 6. The codes for the valve seat sealing surface or lining material are represented by Chinese pinyin letters. Table 14: Codes for valve seat sealing surface or lining materials – Valve seat sealing surface or lining material code: Copper alloy: T; Nitrided steel: D; Rubber: X; Cemented carbide: Y; Nylon plastic: N; Lined rubber: J; Fluoroplastic: F; Lined with lead: Q; Tin-based bearing alloy (Babbitt): B; Stoneware: C; Alloy steel: H; Boronized steel: P. Note: The code for the valve seat sealing surface material that is directly machined from the valve body is “W”. When both the valve seat and the valve disc (gate) sealing surface materials are the same, the code of the less hard material is used (except for diaphragm valves). 7. The nominal pressure value is in accordance with the provisions of JB74-59 \"Nominal Pressure, Test Pressure, and Working Pressure for Pipeline Fittings\". For valves used in power plant industries, when the maximum temperature of the medium exceeds 530 degrees Celsius, the operating pressure is indicated in accordance with Article 5 of JB74-59. 8. The code for the valve body material is represented by Chinese Pinyin letters. Table 15: Valve Body Material Codes. Valve body material code: Gray cast iron – Z; Cr5Mo1 – I; Malleable cast iron – K; 1Cr18Ni9Ti – P; Ductile iron – Q; Cr18Ni12Mo2Ti – R; Copper and copper alloys – T; 12CrMoV – V; WCB – C. Note: This code is omitted for gray cast iron valve bodies with PN ≤ 1.6 MPa and for carbon steel valve bodies with PN ≥ 2.5 MPa.

Chlorine is listed among highly toxic chemicals, and valves with bellows sealing should generally be used.

The chlorine valves here start to leak after some time. Are there any more durable valves? This post was last edited by limingshuguang on 2009-4-3 21:13

There are books dedicated to valves on the forum; go and look for them. I’ll just ask this one question – in the future, when I come across the Z41F model, I won’t know what to do

There are specialized books you can consult!

J41F: J-type stop valve, 4 flange connections, 1 straight-through type; F-type valve designed specifically for chlorine use

J is a stop valve, 4 is flange connection, 1 is straight-through type, F sealing surface refers to fluoroplastic