Za40 gate valve

Must be a typo; Z and A are close to each other: lol

It was probably compiled by oneself; the second digit in JB/T308 represents the drive method code, and it is always a number with no letters. The valve model should indicate elements such as the type of valve, drive method, connection style, structural features, material of the sealing surface, material of the valve body, and nominal pressure. The standardization of valve models facilitates the design, selection, and sales of valves. There are an increasing number of types and materials for valves today, and the coding system for valve models is also becoming more complex. Although our country has unified standards for the designation of valve models, they are increasingly failing to meet the needs of the development of the valve industry. Currently, valve manufacturers generally use a unified numbering system ； Where a unified numbering method cannot be adopted, each manufacturer formulates its own numbering system according to its own needs. I. Method for specifying valve models: JB308-75 \"Method for Specifying Valve Models\" applies to gate valves, throttle valves, ball valves, butterfly valves, diaphragm valves, plug valves, stopcocks, check valves, safety valves, pressure relief valves, and steam traps used in industrial pipelines. It includes the coding of valve models and the naming of valves. 1: Valve model designation The valve model consists of 7 units, the meanings of which are as follows (that is, the first unit represents the type code) ； Unit 2 represents the transmission mode code ； By the same logic) For example, taking Q941F-16P as an instance, the letter Q denotes 1 unit (that is, the valve type is a ball valve) ； 9 represents Unit 2 (i.e., the electric drive method among the transmission methods) ； 4 represents 3 units (i.e., the flange connection in the connection method) ； 1 represents the structural format of a valve with 4 units ； F represents unit 5 (i.e., the PTFE seal ring in the sealing material) ； 16 represents 6 units (i.e., one of the nominal pressures; in this example, it is 1.6 MPa) ； P represents unit 7 (in this example, the material is stainless steel 1cr18Ni9Ti) ； The model numbering is shown in Table 1. Table 1: Unit 1, Unit 2, Unit 3, Unit 4, Unit 5, Unit 6, Unit 7 – represents the type code, transmission method code, connection type code, structural form code, valve seat sealing surface or lining material code, nominal pressure code, and valve body material code. 2: Type code (i.e., Unit 1 in Table 1): The type code is represented using Pinyin letters. As shown in Table 2: Table 2: Type Code Type Code Gate Valve Z Diaphragm Valve G Globe Valve J Check Valve and Foot Valve H Plunger Valve U Safety Valve A Throttle Valve L Pressure Reducing Valve Y Ball Valve Q Trap Valve S Butterfly Valve D Plug Valve X 3: Actuation method code (i.e., Unit 2 of Table 1): The actuation method code is represented by Arabic numerals. As shown in Table 3: Table 3: Transmission Method Code Transmission Method Code Electromechanical 0 Bevel gear 5 Electromagnetic-hydraulic 1 Pneumatic 6 Electro-hydraulic 2 Hydraulic 7 Worm gear 3 Pneumatic-hydraulic 8 Spur gear 4 Electric 9 Note: 1. Codes for transmission via handwheel, handle, or wrench, as well as for safety valves, pressure relief valves, and steam traps, are omitted. 2. For pneumatic or hydraulic types: normally open types are denoted by 6 k and 7 k ； Normally closed is indicated by 6 B and 7 B ； Pneumatic with manual operation is indicated by 6 S ； Explosion-proof electric types are denoted by “9 B”. 4: Connection type code (i.e., cell 3 in Table 1): As shown in Table 4: Table 4: Connection Type Code Connection Type Code Internal thread 1 Clamp-type 7 External thread 2 Clamp 8 Flange 4 Collar 9 Welding (including butt welding and socket welding) 6 5: Structural form code (i.e., cell 4 in Table 1): The structural form code is represented by Arabic numerals, as shown in Tables 5 to 14: Table 5: Structural forms of gate valves: Gate Valve Structural Form Code Stem-type Wedge-type Elastic gate plate 0 Rigid Single gate plate 1 Double gate plates 2 Parallel single gate plate 3 Double gate plates 4 Stemless wedge-type Single gate plate 5 Double gate plates 6 Table 6: Structural form codes for globe valves and throttle valves: Globe Valve and Throttle Valve Structural Form Code Straight-through type 1 Angle type 4 Straight-flow type 5 Balanced right-angled type 6 General type 7 Table 7: Structural form codes for ball valves: Ball Valve Structural Form Code Floating Straight-through type 1 L-type Triangular type 4 T-type Fixed Straight-through type 7 Table 8: Structural forms of butterfly valves: Diaphragm valve structural form codes Gable type 1 Shut-off type 3 Gate-type 7 Table 9: Structural form codes for diaphragm valves: Butterfly valve structural form codes Lever type 0 Vertical plate type 1 Inclined plate type 3 Table 10: Structural form codes for plug valves: Plug valve structural form codes Packing Straight-through type 3 T-type three-way type 4 Four-way type Oil seal Straight-through type 7 T-type three-way type 8 Table 11: Structural form codes for check valves and foot valves: Check Valve and Foot Valve Structural Form Code Lift type Straight-through type 1 Lift-up type 2 Swing type Single disc type 4 Multi-disc type 5 Double disc type 6 Table 12: Structural form codes for safety valves: Safety Valve Structural Form Code Spring-sealed With fins Fully open type 0 Slightly open type 1 Fully open type 2 With wrench Fully open type 4 Unsealed Double spring slightly open type 3 Slightly open type 7 Fully open type 8 Slightly open type 5 With control mechanism Fully open type 6 Pulse type 9 Table 13: Structural form codes for pressure reducing valves: Steam trap structural form codes Float type 1 Bell-type float 5 Bimetallic strip type 7 Pulse type 8 Thermodynamic type 9 Table 14: Structural form codes for steam traps: Pressure reducing valve structural form codes Diaphragm type 1 Spring diaphragm type 2 Piston type 3 Bellows type 4 Lever type 5 6: Code for valve seat sealing surface or lining material (i.e., cell 5 in Table 1): The code for the valve seat sealing surface or lining material is represented by Chinese pinyin letters, as shown in Table 15: Table 15: Code for valve seat sealing surface or lining material Valve Seat Sealing Surface or Lining Material Code Copper alloy T Cemented carbide Y Rubber X Liner J Nylon plastic N Lead-lined Q Fluoroplastic F Enamel-coated C Tin-lead bearing alloy (Babbitt) B Boronized steel P Alloy steel H Graphite SM Nitrided steel D Note: Materials for the sealing surface directly processed from the valve body are indicated by “W” ； When the materials of the sealing surfaces of the valve seat and the valve disc (gate) are different, use the code for the lower-hardness material (except for diaphragm valves). 7: Nominal pressure code (i.e., cell 6 in Table 1): The nominal pressure code is expressed in Arabic numerals, and its value is 10 times the nominal pressure value in megapascals (MPa). For valves used in the power plant industry, when the maximum temperature of the medium exceeds 530 ’C, this value is 10 times the operating pressure in megapascals (MPa). 8: Valve body material code (i.e., cell 7 in Table 1): The valve body material code is represented using Pinyin letters, as shown in Table 16. This code is omitted for cast iron valves with a PN value of less than 1.6 MPa and for carbon steel valves with a PN value greater than 2.5 MPa. Table 16: Valve body material codes: Valve body material Code Valve body material Code Gray cast iron Z 1Cr5Mo, ZG1Cr5Mo I Malleable cast iron K 1Cr18Ni9Ti, ZG1Cr18Ni9Ti P Ductile cast iron Q 1Cr18Ni12Mo2Ti, ZG1Cr18Ni12MoTi R Copper and copper alloys T 12CrMoV V Carbon steel C ZG12CrMoV V

a should be the uppercase A, with a subscript.

Z stands for gate valve; there’s no A – it might be a typing error. The table of valve codes listed above is quite detailed

There’s no doubt about it – BDI also offers the same valves.

Is there no valve specification sheet? It should contain information regarding the valve codes. Just giving the manufacturer a code isn’t helpful either – it doesn’t match the standards

In SEPD 0704, ZA40W-16R3 is a valve made of stainless steel; mine here is made of carbon steel. After checking some information, some people say it’s from the A series, and it’s shorter. Some say it’s neck contraction.

Is SEPD 0704 a standard or a company policy?