Method for compiling common material models

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I. Standard Method for Compiling Valve Model Numbers
The compilation and arrangement format of valve model numbers is as follows:口口口口口口口
Valve type code Transmission method code Connection form code Structural form code Seal surface or lining material code Nominal pressure value Valve body material code

The type codes are represented using Pinyin letters as shown in the table below:
Type code Meaning
Z Gate valve
X Plug valve
J Globe valve
H Check valve and foot valve
L Throttle valve
A Safety valve
Q Ball valve
Y Pressure reducing valve
D Butterfly valve
S Diaphragm valve
G ...

Meaning of various valve model numbers:
1 Pinyin letter representing the valve type
2 One digit representing the transmission method
3 One digit representing the connection form
4 One digit representing the structural form
Pinyin letter representing the seal surface or lining
Number representing the nominal pressure in kg/m2
Pinyin letter representing the valve body material:
Z – Gate valve; J – Globe valve; L – Throttle valve; Q – Ball valve; D – Disc valve; H – Check valve and foot valve; G – Diaphragm valve; A – Safety valve; T – Control valve; X – Plug valve; Y – Pressure reducing valve; S – Drain valve

DZ – Electromagnetic valve; O – Electro-mechanical type 1 (electromagnetic-hydraulic); 2 – Electro-mechanical type 2 (electric-hydraulic); 3 – Worm gear drive; 4 – Spur gear drive; 5 – Bevel gear drive; 6 – Pneumatic; 7 – Hydraulic; 8 – Pneumatic-hydraulic; 9 – Electric. Others: Handwheel, handle, wrench – No code specified.
Thread types: 1 – Internal thread; 2 – External thread; 3 – Flange (used for double-spring safety valves); 4 – Flange; 5 – Flange (used for lever-type, safety door, single-spring safety doors); 6 – Welded; 7 – Clamp-type; 8 – Band clamp – (See the table of valve connection forms on the next page.)

Valve body material codes:
T – Copper alloy; H – Alloy steel; B – Tin-based shaft (Babbitt alloy, Inconel alloy); Y – Cemented carbide; X – Rubber; J – Rigid rubber; SA – Polytetrafluoroethylene; SB – Polytetrafluoroethylene; SC – Polyvinyl fluoride; SD – Phenolic plastic; SN – Nylon.

Valve body manufacturing methods:
Z – Gray cast iron (usually not indicated); X – Malleable cast iron; Q – Ductile iron; T – Copper alloy; B – Lead alloy; II – Chrome-molybdenum alloy steel; L – Chrome alloy; P – Chrome-nickel-titanium steel; V(II) – Chrome-molybdenum-vanadium alloy steel; R – Chrome-nickel-molybdenum-titanium steel.

Seal materials:
F – Fluoroplastic; P – Leather (boronized steel); S – Plastic; D – Nitrided steel; CJ – Lined with rubber; TC – Enameled; CS – Lined with plastic; CQ – Lined with lead; W – Seal ring processed from the valve body; C – Carbon steel (usually not indicated); G – Siliceous iron.

Structural forms of various valves:
1 Gate valve Z: Stem-type wedge gate valve, Single stem wedge gate valve, Double stem wedge gate valve – Parallel double stem wedge gate valve, Hidden stem wedge gate valve, Hidden stem wedge gate valve – Parallel hidden stem wedge gate valve.
J Globe valve: Straight-through (cast), Angle-type (cast), Straight-through (forged), Angle-type (forged), Direct-flow type – Straight-through (without packing), For pressure gauge use.
G Diaphragm valve: Straight-through, Angle-type – Direct-flow type.
Q Ball valve: Straight-through (cast) – Straight-through (cast).
X Plug valve: Straight-through, Adjustable, Straight-through with packing, Three-way with packing, Four-way with packing – Oil-sealed three-way, Oil-sealed, For liquid level indicator use.
H Check valve: Straight-through lift type (forged), Vertical lift type, Straight-through lift type (forged), Angle flap swing type, Multi-flap swing type – Rocker plate type.
D Butterfly valve: Rotating eccentric shaft type – Lever type, Spring type.
A Safety valve: Fully closed, Fully open, Fully closed with wrench, Slightly opened with wrench, Fully open with wrench – Not fully closed, Slightly opened with wrench, Not fully closed, Fully open with wrench – With radiator, Fully open. Lever type A safety valve: Single rod type, Slightly opened, Single rod type, Slightly opened, Double rod type, Slightly opened, Double rod type, Fully open.
Y Pressure reducing valve: External spring diaphragm type, Internal spring diaphragm type, Diaphragm-piston type, Bellows type, Lever-spring type, Air cushion diaphragm type – Others: Electric valve: “B” denotes an explosion-proof electric actuator. “Those without specified codes, “Y” and “S”, are all standard electric devices. Valve model: Adding “K” at the beginning indicates a sulfur-resistant valve ； “G” refers to metal-lined corner gaskets and additional flanges, bolts, and nuts. “G” denotes the cutoff, throttle valve of the combined design. “C” denotes the CVA standard. “S” denotes the groundwater gate. “W” high and medium pressure indicates a bellows valve ； “\"W\" low pressure indicates horizontal installation. ““HD” denotes a check butterfly valve ； “\"GD\" stands for high-vacuum stop valve. “D” denotes the low-temperature valve. Material: 1) C4 and C6 denote new steel grades resistant to concentrated nitric acid. 2) TI refers to industrially used passive titanium resistant to severe corrosion. 3) N denotes aluminum, niobium, copper, nitrogen, and steel. 4) RL denotes ultra-low carbon stainless steel. II. Method for Compiling Cable Models
Meaning of Power Cable Models
Insulation layer, Conductor, Sheath, Outer sheath ———— Rated voltage (kV), Number of conductors × Cross-sectional area of each conductor (mm²) + Cross-sectional area of neutral conductor (represented by “1”) × Cross-sectional area of neutral conductor (mm²)

Model Composition, Simple Name Code
Model Composition, Simple Name Code
Insulation layer: Paper insulation, Rubber insulation, Polyvinyl chloride insulation, Polyethylene insulation, Cross-linked polyethylene insulation
ZXV, YYJ

Features: Non-dripping, Oil-filled, Dust-filtering
Conductor: Copper, Aluminum (not indicated)
L
Outer sheath: Anti-corrosion level 1, Level 2
12
Sheath: Lead-clad, Aluminum-clad, Polyvinyl chloride sheath, Non-flammable rubber sheath
QLV, HF
Sacking wrapping, Armored with sacking, Armored with steel strips, Armored with fine steel wires
Corresponding bare outer sheath, Corresponding inner armor, Outer sheath: Polyvinyl chloride sheath, Polyethylene sheath
1235090203

Features: Integrated type, Phase-separated lead-clad, Phase-separated sheath; Dry insulation (not indicated)
FP
Oil-impregnated paper insulation
For power cables with oil-impregnated paper insulation, the letter “Z” representing insulating paper is used as the first character in the model code; the meanings of the remaining characters are as follows:
Category, Purpose, Conductor, Insulation, Inner sheath, Features, Outer sheath
Z – Paper-insulated cable; T – Copper; L – Aluminum
Z – Oil-impregnated paper; Q – Lead sheath; L – Aluminum sheath
CY – Oil-filled; F – Phase-separated; D – Non-dripping; C – Dust-filtering
02, 03, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 44, 1, 241, etc.

Note: a. The meanings of the numbers are detailed in the attached table below. b. The letter T representing a copper core is generally omitted. For example: ZQD02 – paper-insulated cable with a lead sheath, no dripping; PVC outer sheath; copper core, no dripping; oil-impregnated paper insulation, lead sheath, PVC cover. Power cable. ZLL32 – paper-insulated cable with an aluminum core and aluminum sheath, fine round steel wire armor, PVC outer cover; aluminum core, viscous oil-impregnated paper insulation, aluminum sheath, bare fine steel armor. Power cable. The model of the cable’s outer covering is indicated by Arabic numerals, in order of the structure of the armor layer and the outer coating. The main materials used and their meanings for each digit are shown in the table below. 　 Marking: Armoring layer; Marking: Outer sheath layer. 0: None; 0: None; 1-1: Fiber layer; 2: Double steel strips (24 – steel strips, thick round wires); 2: Polyvinyl chloride sleeve; 3: Thin round wires; 3: Polyethylene sleeve; 4: Thick round wires (44 – double thick round wires); 4: Cross-linked polyethylene insulated power cable. Cross-linked polyethylene insulated power cables are identified with the code letter “YJ” at the beginning; the meanings of the other letters and codes are as follows: Category, Purpose, Conductor, Insulation, Sheath, Outer cover. YJ – Cross-linked polyethylene cable; T* – Copper; YJ – Cross-linked polyethylene; LW – Corrugated aluminum sheath; 22, 23: L – Aluminum; V – Polyvinyl chloride; 32, 33: Y – Polyethylene; 42, 43: Q – Lead sheath, etc. Note: The code letter “T” for copper conductors is generally omitted. S- when copper wire shielding is used. YJV: Power cable with cross-linked polyethylene insulation and polyvinyl chloride sheathing; copper core, cross-linked polyethylene insulation, vinyl chloride sheathing. VJVV22: Power cable with cross-linked polyvinyl chloride insulation, aluminum core, polyvinyl chloride sheathing, and steel tape armoring; aluminum core, cross-linked polyethylene insulation, polyvinyl chloride sheathing, steel tape armoring. The main models and names are listed in the table below. Model name: Copper core, aluminum core. YJV, YJLV – Power cables with cross-linked polyethylene insulation and polyvinyl chloride sheathing. YJVYJLY – Power cables with cross-linked polyethylene insulation and polyethylene sheathing. YJV22, YJLV22 – Power cables with cross-linked polyethylene insulation, steel tape armor, and polyvinyl chloride sheathing. YJV23, YJLY23 – Power cables with cross-linked polyethylene insulation, steel tape armor, and polyethylene sheathing. YJV32, YJLV32 – Power cables with cross-linked polyethylene insulation, fine steel wire armor, and polyvinyl chloride sheathing. YJV33, YJLV33 – Power cables with cross-linked polyethylene insulation, fine steel wire armor, and polyethylene sheathing. YJV42, YJLV42 – Power cables with cross-linked polyethylene insulation, thick steel wire armor, and polyvinyl chloride sheathing. YJV43, YJLV43 – Power cables with cross-linked polyethylene insulation, thick steel wire armor, and polyethylene sheathing. Power cables with polyvinyl chloride insulation and polyvinyl chloride sheathing. The insulating plastic is indicated by the letter “V” at the beginning; the meanings of the other letters in the model names are as follows: Category/Use, Conductor, Insulation, Sheathing, Outer cover. V – Plastic cable; T – Copper; V – Polyvinyl chloride. 22, 23, 32 – L – Aluminum; 33, 42, 43 – …… etc. Note: The letter “T” representing copper conductor is usually omitted. For example: VV22 – Power cable with PVC insulation, PVC sheathing, and steel tape armor; VLV42 – Power cable with aluminum conductor, PVC insulation, PVC sheathing, and thick steel tape armor. Used for control cables and signal cables. Conductor, insulation layer, sheathing, outer sheathing – Rated voltage (kV), number of conductors × cross-sectional area of conductors (mm²). Model composition, simple name code, purpose: Control cable, Signal cable. K, P – Conductor: copper core, aluminum core (not indicated); L – Insulation layer: rubber, PVC, polyethylene. X, V, Y – Sheathing: lead-coated, PVC, non-flammable sheathing. Q, V, HF – Outer sheathing: burlap wrapping, steel tape armor, fine steel wire armor, thick steel wire armor; corresponding bare outer sheathing, corresponding internal armor. Outer sheathing: 1, 2, 3, 5, 0, 9. Coding of control cable models and letter representation: Category, purpose, conductor, insulation, sheathing/shielding characteristics, outer sheathing, derivatives/characteristics. K: Code for control cable series; T: Copper core; *Y: Polyethylene; Y: Polyethylene 02, 03; L: Aluminum core; V: PVC; V: PVC 20, 22; 80, 105; X: Rubber; F: Neoprene; 23, 30; YJ: Cross-linked polyethylene; Q: Lead sheathing; 32, 33; P: Woven shielding. 1, 2. Note: *The letter “T” represents a copper core and is usually abbreviated in model codes. 　The cable models and names are listed in the table below. Model, Cable Name, Main Purpose:
KXV – Control cable with copper core, rubber insulation, and PVC sheath; for fixed installation.
KX22 – Control cable with copper core, rubber insulation, steel tape armor, and PVC sheath; for fixed installation.
KX23 – Control cable with copper core, rubber insulation, steel tape armor, and polyethylene sheath; for fixed installation.
KXF – Control cable with copper core, rubber insulation, and neoprene sheath; for fixed installation.
KXQ – Control cable with copper core, rubber insulation, and exposed lead coating; for fixed installation.
KXQ02 – Control cable with copper core, rubber insulation, lead coating, and PVC sheath; for fixed installation.
KXQ03 – Control cable with copper core, rubber insulation, lead coating, and polyethylene sheath; for fixed installation.
KXQ20 – Control cable with copper core, rubber insulation, lead coating, and exposed steel tape armor; for fixed installation.
KXQ22 – Control cable with copper core, rubber insulation, lead coating, steel tape armor, and PVC sheath; for fixed installation.
KXQ23 – Control cable with copper core, rubber insulation, lead coating, steel tape armor, and polyethylene sheath; for fixed installation.
KXQ30 – Control cable with copper core, rubber insulation, lead coating, and exposed steel wire armor; for fixed installation.
KLY22 – Control cable with aluminum core, polyethylene insulation, steel tape armor, and PVC outer sheath.
KXQ23 – Control cable with rubber insulation, lead sheath, steel tape armor, and polyethylene outer sheath.
Control cables with copper core and rubber insulation, along with steel tape armor; the meaning of the materials indicated by the outer sheath model (numeric codes) is derived in accordance with GB2952 standards, with numbers and letters representing specific characteristics: 1 – Copper wire winding for shielding ； 80-Heat-resistant + 80°C plastic ； R-soft structure core ； 2-Copper tape winding shielding ； 105-Heat-resistant +105°C plastic. 　Signal cables are identified first by the code letter indicating their purpose, and are generally organized according to the following pattern: Category, Purpose, Conductor, Insulation, Inner Sheath, Outer Sheath. T – Copper core; *V – Polyvinyl chloride; A – Comprehensive sheath. 11,2P – Signal cable; L – Aluminum core; Y – Polyethylene; L – Aluminum sheath. 20,22 – V – Polyvinyl chloride sheath, etc. Note: *The copper core is represented by the letter “T”, which is usually omitted in the model designation. For example: PYV29 signal cable – copper core with polyethylene insulation and polyvinyl chloride outer sheath, reinforced with steel strips; PVV signal cable – copper core with polyvinyl chloride insulation and polyvinyl chloride sheath, reinforced with steel strips. The outer sheath type (numeric code) indicates the protective level of the cable’s outer sheath structure (according to the old standards). The meanings of the relevant codes for this type of cable are as follows: 11 – bare metal sheath, first-level outer sheath; 20 – bare steel strip reinforcement sheath; 2 – steel strip reinforcement with jute covering sheath; 29 – inner steel strip reinforcement sheath. Communication cables: The composition of communication cable models includes conductor, insulation, inner sheath, features, and outer sheath (represented by a number), along with additional identifiers and the numerical meaning thereof. Details regarding the codes for communication cables are provided in the table below. For the codes missing in the table, T (filler) and G (high frequency) are added in the derivatives. Category, Purpose, Conductor, Insulation, Inner Sheath, Features, Outer Sheath, Derived Digital Meaning: H – Urban telephone cable; T – Copper core; V – Polyvinyl chloride; H – Rubber sheath; C – Self-supporting. 02, 031 – First type: 0 – No armor; 0 – No outer covering. HB – Communication cable; L – Aluminum core; Y – Polyethylene; L – Aluminum sheath; D – Striped. 20, 212 – Second type: 1 – 1 – Fiber layer. HE – Long-distance communication cable; G – Iron core; X – Rubber; Q – Lead sheath; E – For headphones. 22, 2325, 2-252 kHz; 2 – Double steel strips; 2 – Polyvinyl chloride coating. HH – Undersea communication cable; YF – Foam polyethylene; V – Polyvinyl chloride; J – For switches. 23, 32…… etc.; 3 – Fine round steel wire; 3 – Polyethylene. HJ – Local use cable; Z – Paper..... etc.; P – Shielded. 33, 41; 4 – Thick round steel mesh; 4 – HO – Coaxial cable; S – Underwater. 42, 43; HR – Telephone flexible cable; Z – Integrated..... etc.; HP – Wiring cable; W – Tail cable; HU – Mine telephone cable; HW – Island communication cable; CH – Marine telephone cable. Computer shielded cable types and specifications: (1) DJYPV – Shielded cable for computer control, with copper core, polyethylene insulation, twisted copper wires for shielding, and polyvinyl chloride outer sheath. (2) DJYP1V: Shielded cable for computer control, with a copper core, polyethylene insulation, twisted aluminum-plastic composite tape shielding, and polyvinyl chloride sheath. (3)DJYP1V22: Shielded cable for computers, with a copper core, polyethylene insulation, twisted aluminum composite tape shielding, and PVC sheath along with armor. (4) DJYP2V: Shielded cable for computers, with a copper core, polyethylene insulation, twisted copper straps for shielding, and a polyvinyl chloride jacket. (5) DJVP2V22: Shielded cable for computers, with copper core, polyethylene insulation, twisted copper tape shielding, and PVC sheath along with steel tape reinforcement. (6) DJYPVP: Shielded cable for computer control, with copper core, polyethylene insulation, twisted copper wires, braided shielding, and polyvinyl chloride sheath. III. Wire types and names: Steel-aluminum stranded wire, Aluminum stranded wire; Numerical code for LJ, Alphabetical abbreviation – L for aluminum, J for stranded wire; Nominal cross-sectional area. Steel-core aluminum stranded wire: LGJ; Numerical code for steel-core aluminum stranded wire, Alphabetical abbreviation – L for aluminum, G for steel, J for stranded wire; Nominal cross-sectional area. Insulated wires: Polyvinyl chloride insulated wires, BV copper-core polyvinyl chloride insulated wires ； BLV aluminum core polyvinyl chloride insulated wire ； BVR copper core PVC insulated flexible wire ； BVV copper core PVC insulated PVC sheathed round wire ； BLVV round wire with aluminum core, PVC insulation, and PVC sheath ； BVVB copper core, PVC insulated, PVC sheathed flat wire ； BV-105 copper-core polyvinyl chloride high-temperature resistant insulated wire. Polyvinyl chloride insulated and shielded wire (GB5023.5-85) AVP copper core polyvinyl chloride insulated and shielded wire ； RVP copper core PVC insulated shielded flexible wire ； RVVP copper core, PVC insulated, shielded with PVC sheath flexible wire ； RVVP1 copper core, PVC insulated, wrapped shield, PVC sheathed flexible wire ； Rubber-insulated wires (JB1601-75): Model names include BLXF, BXF, BLX – aluminum-core neoprene insulated wires; copper-core neoprene insulated wires; aluminum-core rubber insulated wires; copper-core rubber insulated wires. IV. Busbar models and their meanings: QLFM type – fully connected phase-separated enclosed busbars. QLFM: Fully connected phase-separated enclosed busbar. Rated current (A), Rated voltage (KV). Z: Self-cooling; J: Local air cooling. FQFM type – segmented fully connected phase-separated enclosed busbars. FQFM: Segmented fully connected phase-separated enclosed busbar. Rated current (A), Rated voltage (KV). Z: Self-cooling. GXFM type – common-box busbars. GXFM: Common-box enclosed busbar. Rated current (A), Rated voltage (KV). Z: Self-cooling. GGFM type – common-box phase-separated busbars. GGFM: Common-box phase-separated enclosed busbar. Rated current (A), Rated voltage (KV). Z: Self-cooling. CCX6 type – densely insulated plug-in bus ducts. CCX6: Plug-in densely insulated bus duct. Code, Design sequence number, Rated current (200–2500A), Function unit code (A: main line, B: connection, C–J: commutation, P: expansion, G1: ground wire, Z: terminal, X: plug-in feed box), Function unit length (600–3000mm), Phase wires (three-phase 3, three-phase 4, three-phase 5)