1 Scope
This standard specifies the designation of the general valve model number, type code, drive code, connection form code, structure code, seal surface material code, valve material code and pressure code.
This standard applies to general gate valves, globe valves, throttle valves, butterfly valves, ball valves, diaphragm valves, plug valves, check valves, safety valves, pressure reducing valves, power station valves, steam traps, sewage valves, and plunger valves. Modeling.
The clauses in the following documents have been adopted as references to this standard. For dated references, subsequent amendments (not including errata content) or revisions do not apply to this standard. However, parties that have reached an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated references, the latest version is applicable to this standard.
GB/T 1048 nominal pressure of pipeline components
3.1 Valve Modeling Method
3.1.1 The valve model consists of seven parts: valve type, drive type, connection type, structure type, sealing surface material or lining material type, pressure code or working pressure at working temperature, and valve body material.
3.1.2 The order of preparation shall be as follows: valve type, drive type, connection type, structure type, sealing surface material or type of lining material, nominal pressure code or working pressure code under working temperature, and valve body material.
JB/T 308-2004
3.2 valve type code
3.2.1 Valve type codes are expressed in Hanyu Pinyin letters and are expressed in Table 1.
Table 1 Valve type code
Valve Type Code Valve Type Code Spring Load Relief Valve A Drain Valve P Butterfly Valve D Ball Valve Q Diaphragm Valve G Steam Trap S Lever Lever GA Piston Valve U Check Valve and Bottom Valve H Plug Valve X Stop Valve J Pressure Reducing Valve Y throttle valve L gate valve Z3.2.2 When the valve also has other functions or other specific structures, add a Chinese Pinyin letter before the valve type code, as specified in Table 2.
Table 2 Valves with other functional roles or with other specific structures
2nd function Name designation 2nd function Role designation Code Insulation Type B Slagging Type P Low Temperature Type Da Fast Type Q Fireproof Type F (Stem Seal) Bellows Type W Suspension Type H — — Cryogenic Type Allowed Operating Temperature Below -46 °C valve. 3.3 Drive method code3.3.1 Drive method code is represented by Arabic numerals, as specified in Table 3.
Table 3 Valve drive method code
Actuation Code Drive Method Code Electromagnetic 0 Bevel Gear 5 Electromagnetic - Hydraulic 1 Pneumatic 6 Electric - Hydraulic 2 Hydraulic 7 Worm Gear 3 Gas - Hydraulic 8 Spur Gear 4 Electric 9 Note: Code 1, code 2 and code 8 are When the valve is opened and closed, two kinds of power sources are required to operate the valve at the same time.
3.3.2 Safety Valves, Pressure Reducing Valves, Trap Valves, and Handwheels Valves that are directly connected to the valve stem operating structure are omitted from this designation and are not indicated.
3.3.3 Valves for pneumatic or hydraulic actuators: Normally open type 6K, 7K; Normally closed type 6B, 7B;
3.3.4 The valve of the explosion-proof electric device is represented by 9B;
3.4.1 The connection form code is represented by Arabic numerals, as specified in Table 4.
3.4.2 The specific structure of various connection types, the use of standards or methods (such as: flange surface form and sealing method, welding form, thread form and standard, etc.) are not indicated by a symbol after the connection code, and should be in the product design, Detailed instructions are given in documents such as instructions or ordering contracts.
Table 4 Valve connection connection form code
Connection type Code Connection type Code Female thread 1 Collet 7 Male thread 2 Clip 8 Flange type 4 Card sleeve 9 Welding type 6 3.5 Valve structure type codeThe valve structure is represented by Arabic numerals according to Table 5-15.
Table 5 Gate valve structure form code
Structure Type Code Stem Lift (Ming) Wedge Flexible Gate 0 Rigid Gate Single Gate 1 Double Gate 2 Parallel Gate Single Gate 3 Double Gate 4 Stem Non-Lifting (Hole ) Wedge gate single gate plate 5 Double gate plate 6 Parallel gate single gate plate 7 Double gate plate 8Table 6 Structure Codes of Globe, Throttle and Plunger Valves
Structure Type Code Structure Code Valve Unbalanced Straight Runner 1 Disc Balanced Straight Runner 6 Z-shaped runner 2 Angle runner 7 Three-way runner 3 — — Corner runner 4 — — DC runner 5 — —Table 7 Ball valve structure form code
Structure Code Structure Structure Code Floating ball Straight flow path 1 Fixed ball straight flow path 7 Y-shaped three-way flow path 2 Four-way flow path 6 L-shaped three-way flow path 4 T-shaped three-way flow path 8 T-shaped three-way flow path 5 L-shaped three-way flow channel 9 - - hemisphere straight-through 0Table 8 Butterfly valve structure form code
Structure Type Code Structure Type Code Seal Type Single Offset 0 Unsealed Single Offset 5 Center Vertical Plate 1 Center Vertical Plate 6 Double Offset 2 Double Offset 7 Triple Offset 3 Triple Offset 8 Linkage Mechanism 4 Linkage Mechanism 9Table 9 Diaphragm valve structure form code
Structure Code Structure Structure Code Roof Channel 1 Straight Channel 6 DC Channel 5 Y-Shaped Angle Channel 8Table 10 Coupling valve structure form code
Structure Type Code Structure Code Packing Sealed Straight Flow Path 3 Oil Sealed Straight Flow Path 7 T-shaped Three-way Flow Path 4 T-shaped Three-way Flow Path 8 Four-way Flow Path 5 -Table 11 Check Valve Structure Code
Structure Type Code Structure Code Lifting Disc Straight Flow Path 1 Swing-opening Valve Single-Valve Structure 4 Vertical Structure 2 Multi-petal Structure 5 Angle-type Flow Path 3 Bi-Valve Structure 6 — — — Butterfly Check Type 7Table 12 Safety valve structure form code
Structure Code Structure Structure Code Spring Load Spring SealStructure with fins all-open type 0 spring loaded spring is not enclosed
Closed and with spanner structure Micro-open type, Double valve 3 Micro-type 1 Micro-type 7 Type 7 Full-type type 2 Full-type type 8 With wrench Full-type type 4 — Single-lever lever type 2 with control mechanism Full-open type 6 Double Lever 4 Pulse 9
Table 13 Relief valve structure form code
Structure Type Code Structure Code Type Film Type 1 Bellows Type 4 Spring Film Type 2 Lever Type 5 Piston Type 3 — —Table 14 Steam trap structure form code
Structure Type Code Structure Type Code Float Type 1 Steam Pressure Type or Membrane Box Type 6 Floating Bucket Type 3 Bimetal Type 7 Liquid or Solid Expansion Type 4 Pulse Type 8 Bell Type Float Type 5 Disc Thermal Power Type 9Table 15 Structure of the drain valve structure
Structure Type Code Structure Type Code Liquid Connection Emission Cut-off Straight-through 1 Liquid Bottom Discharge Elimination Cut-off Type DC 5 Cut-off Angle 2 Cut-off Type Straight-through 6 — — Cut-off Angle Type 7 — — Floating Gate Type Straight-through 8 3.6 seal surface or lining material code3.6.1 In addition to the diaphragm valve, when the material of the seal face of the seal pair is different, it is expressed as a material with low hardness. Valve seat sealing surfaces or lining material designations are in alphabetical letters specified in Table 16.
Table 16 Sealing surface or lining material code
Sealing surface or lining material Code Sealing surface or lining material code Tin-base bearing alloy (Babbs) B Nylon plastic N Enamel C Boronized steel P Nitriding steel D Leaded lead Q Fluorine plastic F Austenitic stainless steel R Ceramic G Plastic S Cr13 Series Stainless Steel H Copper Alloy T Rubber lining J Rubber X Monel M Hard Alloy Y 3.6.2 The diaphragm valve is indicated by the valve body surface material designation.
3.6.3 When the valve sealing auxiliary material is the body material of the valve, the material designation of the sealing surface is indicated by "W".
3.7 Pressure Code
3.7.1 When the pressure level used by the valve is in accordance with the provisions of GB/T l048, the value is expressed in megapascal units (MPa) 10 times the GB/T 1048 standard.
3.7.2 When the maximum temperature of the medium exceeds 425°C, mark the working pressure at the highest working temperature.
3.7.3 The pressure level shall be in pound (1b) or K class units. In the model establishment, there shall be a unit symbol of lb or K after the pressure code column.
3.7.4 The valve body material code of the gray cast iron valve with nominal pressure less than or equal to 1.6 MPa shall be omitted in the model establishment.
3.7.5 The valve body material code of the carbon steel valve with a nominal pressure greater than or equal to 2.5 MPa shall be omitted from the model preparation.
3.8 Body Material Code
The valve body material code is indicated by the prescribed letter of Table 17.
Table 17 Body Material Codes
Valve Body Material Code Body Material Code Carbon Steel C Chrome Nickel Molybdenum Stainless Steel T Cr13 Stainless Steel H Plastic S Chrome Molybdenum Steel I Copper and Copper Alloy T Malleable Cast Iron K Titanium and Titanium Alloy Ti Aluminum Alloy L Chrome Molybdenum Vanadium Steel V Chrome Nickel Stainless steel P Gray cast iron Z Ductile iron Q — — Note: CF3, CF8, CF3M, CF8M and other material grades can be directly marked on the valve body. 3.9 NamedFor connections in the form of "flanges" and in the form of: "open rod", "elastic", "rigid" and "single gate" for gate valves, "through" for globe valves, throttle valves, and "floating" for ball valves "Ball", "fixed ball" and "straight-through", "vertical plate" of butterfly valve, "roof type" of diaphragm valve, "filler" and "straight-through" of plug valve, "straight-through" of check valve and " "Single-valve type", "non-enclosed type" and "valve seat sealing surface material" of the safety valve are all omitted from the naming.
3.10 Modeling Method of Model and Names a) Electric, flanged, and open-wedge double gate plates, valve seat sealing surface material directly processed by the valve body, nominal pressure PN0.1MPa, valve body material is gray cast iron gate valve: Z942W-1 electric wedge type double gate Plate gate valve.
b) Manual, externally threaded, float-through valve seat sealing surface material is fluorine plastic, nominal pressure PN4.0MPa, valve body material is 1Crl8Ni9Ti ball valve: Q21F-40P externally threaded ball valve.
c) Diaphragm valves of pneumatic normally open type, flanged connection, ridge type structure and lined rubber, nominal pressure PN0.6MPa, and valve body made of gray cast iron: G6K41J-6 pneumatic normally open rubber lined diaphragm valve.
d) Hydrodynamic, flanged, vertical plate, seat sealing material for cast copper, valve sealing surface material for rubber, nominal pressure PN0.25MPa, valve body material for gray cast iron butterfly valve: D741X-2.5 hydraulic butterfly valve.
e) Electric drive butt welding connection, straight-through, valve seat sealing surface material for surfacing hard alloy, working temperature 540 °C, working pressure 7.0MPa, valve body material chrome molybdenum vanadium steel shut-off valve: J961Y-P54170V electric welding cut-off valve.