Valve code

HV manual valve, XV pneumatic on/off valve, CV control valve. For BV and PV, I need to check the legend on your end

1. For nominal sizes below DN, the DN values are in accordance with the GB/T 1047-2004 standard. DN: A size designation consisting of a combination of letters and numbers used for pipeline system components. It consists of the letters DN followed by a dimensionless integer. This value is directly related to characteristic dimensions such as the bore diameter or outer diameter (in mm) of the end connector. Note: Unless otherwise specified in the relevant standards, the digits following the letter DN do not represent measurement values and cannot be used for calculation purposes. Those standards that adopt the DN designation system should specify the relationship between DN and the dimensions of the pipe components, such as DN/OD or DN/ID. The preferred DN values are as follows: DN6, DN100, DN700, DN2200, DN8, DN125, DN800, DN2400, DN10, DN150, DN900, DN2600, DN15, DN200, DN1000, DN2800, DN20, DN250, DN1100, DN3000, DN25, DN300, DN1200, DN3200, DN32, DN350, DN1400, DN3400, DN40, DN400, DN1500, DN3600, DN50, DN450, DN1600, DN3800, DN65, DN500, DN1800, DN4000, DN80, DN600, DN2000. 2. PN (nominal pressure): The nominal pressure values are in accordance with the GB/T 1048-2004 standard. PN: A designation consisting of letters and numbers used as a reference, related to the mechanical properties and dimensional characteristics of pipeline system components. It consists of the letters PN followed by a dimensionless number. Note: The digits following the letter PN do not represent measurement values and should not be used for calculation purposes, unless otherwise specified in the relevant standards. Apart from its association with relevant pipe fitting standards, the term PN has no meaning. The allowable pressure for pipe components depends on the component’s PN value, material and design, as well as the allowable operating temperature; this allowable pressure is specified in the pressure-temperature tables of the relevant standards. All pipe components with the same PN and DN values, together with their corresponding flanges, shall have the same fit dimensions. The PN value should be selected from the following series: PN DIN series, ANSI series – PN2.5, PN20, PN6, PN50, PN10, PN110, PN16, PN150, PN25, PN260, PN40, PN420, PN63, PN100. Note: Other PN values may be used if necessary. 3. Valve model designation method The valve model designation method is primarily based on the JB/T 308-2004 standard. (1) Method for specifying model numbers: Model number specification method I II III IV V – VI VIII I: Type code; II: Drive type code; III: Connection type code; IV: Structural form code; V: Material code for the sealing surface or lining; VI: Pressure code or operating pressure at working temperature; VII: Material code for the valve body. (2) The type codes for valves are expressed in Pinyin, in accordance with the provisions in Tables 1, 2, and 3. “Table 1” Valve type codes: Valve type Code Valve type Code Valve type Code Safety valve A Ball valve Q Butterfly valve D Trap valve S Diaphragm valve G Control valve T Check valve H Plunger valve U Globe valve J Plug valve X Throttle valve L Pressure reducing valve Y Drain valve P Gate valve Z “Table 2” Codes for valves with additional functions: Name of second function Code Name of second function Code Low-temperature type D Slow-closing type H Insulated type B Slag discharge type P Bellows type W Purging type C Telescopic flange type S Fireproof type F V-shaped ball type V Fast type Q “Table 3” Codes for valves with special structures: Name of special structure Code Name of special structure Code Blade-type flat gate valve D Water-sealing type S Gate valve with guide holes K Gate valve without guide holes W (3) The codes for drive methods are represented by Arabic numerals, in accordance with the provisions in “Table 4”. Table 4: Drive Method Codes. Drive Method Code: Electromagnetic – 0; Bevel Gear – 5; Electromagnetic-Hydraulic – 1; Pneumatic – 6; Electro-Hydraulic – 2; Hydraulic – 7; Turbine – 3; Pneumatic-Hydraulic – 8; Spur Gear – 4; Electric – 9. Note: Codes 1, 2, and 8 are used when two power sources are required to operate the valve simultaneously during its opening and closing. Safety valves, hydraulic valves, water supply valves, and valves with a manual handwheel that operate by being directly connected to the valve stem – this code is omitted when such valves are involved. For pneumatic or hydraulic types: normally open is indicated by 6K and 7K ； Normally closed is indicated by 6B and 7B ； Pneumatic with manual operation is indicated by 6S ； For explosion-proof electric use, it is denoted by 9B. (4) The connection type code is represented by Arabic numerals in accordance with the provisions of \"Table 5\". \"Table 5\": Connection type codes. Connection type code: Internal thread – 1; Welded connection – 6b; External thread – 2; Clamp connection – 7; Flange connection – 4; Clamp fitting connection – 8; Socket welding connection – 6s; Collar fitting connection – 9. (5) The code for the valve structure type is represented by Arabic numerals, in accordance with the provisions in Tables 6 to 16. “Table 6” Codes for the structural types of gate valves. Structural type code: Stem-type, Wedge-type, Elastic gate plate – 0; Rigid gate plate, Single gate plate – 1; Double gate plates – 2; Parallel type, Single gate plate – 3; Double gate plates – 4; Hidden stem, Wedge-type, Single gate plate – 5; Double gate plates – 6; Parallel type, Single gate plate – 7; Double gate plates – 8. “Table 7” Codes for the structural types of stop valves, throttle valves, and plug valves. Structural type code: Straight-through type – 1; Flow-through type – 5; Z-shaped type – 2; Balanced straight-through type – 6; Three-way type – 3; Angular type – 7; Angular type – 4. “Table 8” Codes for the structural types of ball valves. Structural type code: Floating ball, Straight-through type – 1; Fixed ball, Straight-through type – 7; Y-shaped, Three-way type – 2; Four-way type – 6; L-shaped – 4; T-shaped, Three-way type – 8; T-shaped – 5; L-shaped – 9; Semi-ball straight-through type – 0. “Table 9” Codes for the structural types of ball valves. Structural type code: Sealed type, Centerline type – 1; Unsealed type, Centerline type – 6; Double eccentric type – 2; Double eccentric type – 7; Triple eccentric type – 3; Triple eccentric type – 8; Linkage mechanism – 4; Linkage mechanism – 9. “Table 10” Codes for the structural types of diaphragm valves. Structural type code: Ridge type – 1; Straight-through type – 6; Stop type – 3; Angular type – Y-shaped – 8; Flow-through type – 5. “Table 11” Codes for the structural types of plug valves. Structural type code: Packing seal, Straight-through type – 3; Oil seal, Straight-through type – 7; T-shaped three-way type – 4; T-shaped three-way type – 8; Four-way type – 5. “Table 12” Codes for the structural types of check valves. Structural type code: Lift type, Straight-through type – 1; Swing type, Single disc – 4; Multiple discs – 5; Double discs – 6; Vertical type – 2; Butterfly check type – 7; Angular type – 3; Stop-check type – 8. “Table 13” Codes for the structural types of safety valves. Structural type code: Spring seal, Full-open with fins – 0; Springless seal, With wrench, Dual-spring slightly open – 3; Slightly open – 1; Slightly open – 7; Fully open – 2; Fully open – 8; Fully open with wrench – 4; Fully open with control mechanism – 6; Lever type – 5; Pulse type – 9. “Table 14” Codes for the structural types of pressure relief valves. Structural type code: Diaphragm type – 1; Bellows type – 4; Spring-diaphragm type – 2; Lever type – 5; Piston type – 3. “Table 15” Codes for the structural types of steam traps. Structural type code: Floating ball type – 1; Steam pressure or diaphragm box type – 6; Float bucket type – 3; Bimetallic strip type – 7; Liquid or solid expansion type – 4; Pulse type – 8; Bell-shaped float type – 5; Disk thermodynamic type – 9. “Table 16” Codes for the structural types of drain valves. Structural type code: Discharge connected to liquid level, Straight-through stop type – 1; Intermittent discharge from liquid bottom, Straight-through stop type – 5; Straight-through stop type – 6; Angular stop type – 2; Angular stop type – 7; Floating gate plate type, Straight-through type – 8. (6) The codes for the sealing surface or lining material are represented by letters, in accordance with the provisions of “Table 17”. \"Table 17\" Codes for seal cover or lining materials. Seal cover or lining material Code Seal cover or lining material Code Tin-based bearing alloy (Babbitt) B Nylon plastic N Enameled steel C Boronized steel P Nitrided steel D Lead-lined Q Fluoroplastic F Austenitic stainless steel R Ceramic G Plastic S Cr13 series stainless steel H Copper alloy T Rubber-lined J Rubber X Monel alloy M Cemented carbide Y Note: Except for diaphragm valves, when the sealing surface materials of the sealing pair are different, the material with higher hardness is used. When the materials of the valve sealing pairs are all the same as those of the valve body, the material code for the valve seat sealing surface is denoted by “W”. (7) The nominal pressure value of the valve shall comply with the provisions of GB/T 1048-2005. Valves used in power plant industries are specified with the operating pressure at the maximum operating temperature when the maximum temperature of the medium exceeds 425°C. For valves whose pressure rating is expressed in pounds (Lb) or kilopounds (K), the unit symbol Lb or K should be included after the pressure code in the model designation. (8) The valve body material code is represented by English letters in accordance with the provisions of «Table 18». “Table 18” Valve body material codes: Valve body material code – Carbon steel: C; Ductile iron: Q; Cr13 series stainless steel: H; 0Cr17Ni12Mo2 series stainless steel: R; 1Cr5Mo chromium-molybdenum steel: I; 0Cr17Ni14Mo2 series stainless steel: RL; 15CrMo chromium-molybdenum steel: H; Plastic: S; Malleable cast iron: K; Copper and copper alloys: T; Aluminum alloys: L; Titanium and titanium alloys: Ti; 0Cr18Ni9 series stainless steel: P; Chromium-molybdenum-vanadium steel: V; 0Cr19Ni10 series stainless steel: PL; Gray cast iron: Z. (9) Naming convention: For connection types of “flange”, and for structural types such as “rising stem”, “elastic”, “rigid”, and “single disc” for gate valves; “straight-through” for stop valves and throttle valves; “floating ball” and “straight-through” for ball valves; “vertical plate” for butterfly valves; “ridge type” for diaphragm valves; “packing” and “straight-through” for plug valves; “straight-through” and “single disc” for check valves; and “unsealed type” for safety valves, the “valve seat sealing surface material” is omitted in the naming. (10) Example of the method for compiling model numbers and names: 1) Electric, flange-connected, double wedge-type gate valve with the valve seat sealing surface fabricated directly from the valve body; nominal pressure PN1, valve body material is gray cast iron: Z942W-1 Electric wedge-type double gate valve. 2) Ball valve with manual operation, external thread connection, floating straight-through type; the valve seat sealing surface is made of fluoroplastic, the nominal pressure is PN40, and the valve body material is 1Cr18Ni9Ti: Q21F-40P external thread ball valve. 3) Pneumatic normally open, flange-connected, ridge-type structure with rubber lining, nominal pressure PN6, diaphragm valve made of gray cast iron: G6K41J-6 Pneumatic normally open rubber-lined diaphragm valve. 4) Hydraulic, flange-connected, vertical plate type butterfly valve with a cast copper material for the valve seat sealing surface and rubber material for the valve disc sealing surface; nominal pressure PN2.5; valve body made of gray cast iron: D741X-2.5 Hydraulic Butterfly Valve. 5) Electrically driven globe valve with welded joint, straight-through type, valve seat sealing surface made of cemented carbide, operating pressure of 17.0 MPa at an operating temperature of 540°C, and valve body made of chromium-molybdenum-vanadium steel: J961Y-P54170V electric welded globe valve. 4. Valve materials The list of valve materials below is primarily based on the JB/T 5300-1991 standard. Material properties of valve bodies: Valve body material, Applicable nominal pressure/MPa, Applicable temperature/°C, Applicable media. Gray cast iron: ≤10, -10~200; Media such as water, steam, air, gas, and oils. Ductile cast iron: ≤25, -30~300; Media such as water, steam, air, and oils. Gray iron: ≤40, -30~350; Media such as water, steam, air, and oils. Copper alloys: ≤25, -40~250; Media such as water, seawater, oxygen, air, and oils. Carbon steel: ≤320, -30~450; Media such as water, steam, air, hydrogen, ammonia, nitrogen, and petroleum products. High-temperature steel: ≤16, ≤550; Steam and petroleum products. Low-temperature steel: ≤64, ≥-196; Media such as ethylene, propylene, liquefied natural gas, and liquid nitrogen. Stainless acid-resistant steel: ≤64, ≤200; Media such as nitric acid and acetic acid