The valve model should generally indicate the valve type, drive method, connection form, structural features, sealing surface material, nominal pressure, valve body material, and so on.
The units 1, 2, 3, 4, 5---6, 7, respectively represent the valve type, drive method, connection form, structural form, sealing surface material or lining material, nominal pressure, and valve body material.
Unit One: Valve Type Code
Type | Safety Valve | Butterfly Valve | Diaphragm Valve | Check Valve Foot Valve | Globe Valve | Throttle Valve | Blowdown Valve | Ball Valve | Steam Trap | Plunger Valve | Plug Valve | Pressure Reducing Valve | Gate Valve |
Code | A | D | G | H | J | L | P | Q | S | U | X | Y | Z |
When the valve has other functional roles or specific structures, an additional pinyin letter is added before the valve type code, according to the following table.
Name of Second Function | Code | Name of Second Function | Code |
Insulation Type | B | Slag Discharge Type | P |
Low Temperature Type | D | Quick Type | Q |
Fireproof Type | F | (Stem Seal) Bellows Type | W |
Slow Closing Type | H | --- | --- |
Low temperature type indicates valves that allow a usage temperature below -46℃. | |||
Unit Two: Drive Method
Drive Method | Electromagnetic | Electromagnetic-Hydraulic | Electric-Hydraulic | Worm Gear | Straight Gear | Bevel Gear | Pneumatic | Hydraulic | Pneumatic-Hydraulic | Electric | Handle Handwheel |
Code | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | No Code |
For safety valves, pressure reducing valves, steam traps, and valve structures directly connected to the stem with a handwheel, this code is omitted and not indicated.
For valves operated by pneumatic or hydraulic mechanisms: normally open types are represented by 6K, 7K; normally closed types by 6B, 7B; valves with explosion-proof electric devices are represented by 9B.
Unit Three: Connection Form
Connection Method | Internal Thread | External Thread | Two Different Connections | Flange | Welding | Wafer | Clamp | Ferrule |
Code | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Unit Four: Structural Form
The structural form of the valve is represented by Arabic numerals, according to the following table.
Gate Valve Structural Form Code
Structural Form | Code | |||
Rising Stem (Open Stem) | Wedge Gate | Elastic Gate | 0 | |
Rigid Gate | Single Gate | 1 | ||
Double Gate | 2 | |||
Parallel Gate | Single Gate | 3 | ||
Double Gate | 4 | |||
Non-Rising Stem (Concealed Stem) | Wedge Gate | Single Gate | 5 | |
Double Gate | 6 | |||
Parallel Gate | Single Gate | 7 | ||
Double Gate | 8 | |||
Globe Valve, Throttle Valve, and Plunger Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Non-Balanced Disc | Straightway | 1 | Balanced Disc | Straightway | 6 |
Z-Type Channel | 2 | Angle Channel | 7 | ||
Three-Way Channel | 3 | ||||
Angle Channel | 4 | ||||
Straight Flow | 5 | ||||
Ball Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Floating Ball | Straightway | 1 | Fixed Ball | Straightway | 7 |
Y-Type Three-Way Channel | 2 | Four-Way Channel | 6 | ||
L-Type Three-Way Channel | 4 | T-Type Three-Way Channel | 8 | ||
T-Type Three-Way Channel | 5 | L-Type Three-Way Channel | 9 | ||
Hemisphere Straightway | 0 | ||||
Butterfly Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Sealed Type | Single Eccentric | 0 | Non-Sealed Type | Single Eccentric | 5 |
Central Vertical Plate | 1 | Central Vertical Plate | 6 | ||
Double Eccentric | 2 | Double Eccentric | 7 | ||
Triple Eccentric | 3 | Triple Eccentric | 8 | ||
Linkage Mechanism | 4 | Linkage Mechanism | 9 | ||
Diaphragm Valve Structural Form Code
Structural Form | Code | Structural Form | Code |
Ridge Flow Channel | 1 | Straightway | 6 |
Straight Flow | 5 | Y-Type Angle Channel | 8 |
Plug Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Packing Seal | Straightway | 3 | Oil Seal | Straightway | 7 |
T-Type Three-Way Channel | 4 | T-Type Three-Way Channel | 8 | ||
Four-Way Channel | 5 | ||||
Check Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Lift Type Disc | Straightway | 1 | Swing Type Disc | Single Disc Structure | 4 |
Vertical Structure | 2 | Multi-Disc Structure | 5 | ||
Angle Structure | 3 | Double Disc Structure | 6 | ||
Butterfly Check Type | 7 | ||||
Safety Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Spring Loaded Spring Seal Structure | With Radiator Fully Opened | 0 | Spring Loaded Spring Non-Sealed with Handle Structure | Slightly Opened, Dual Valve | 3 |
Slightly Opened | 1 | Slightly Opened | 7 | ||
Fully Opened | 2 | Fully Opened | 8 | ||
With Manual Fully Opened | 4 | ||||
Lever Type | Single Lever | 2 | With Control Mechanism Fully Opened | 6 | |
Double Lever | 4 | Pulse Type | 9 | ||
Pressure Reducing Valve Structural Form Code
Structural Form | Code | Structural Form | Code |
Diaphragm Type | 1 | Bellows Type | 4 |
Spring Diaphragm Type | 2 | Lever Type | 5 |
Piston Type | 3 |
Steam Trap Structural Form Code
Structural Form | Code | Structural Form | Code |
Float Type | 1 | Steam Pressure Type or Capsule Type | 6 |
Float Bucket Type | 3 | Bimetal Type | 7 |
Liquid or Solid Expansion Type | 4 | Pulse Type | 8 |
Bell Float Type | 5 | Disc Thermodynamic Type | 9 |
Blowdown Valve Structural Form Code
Structural Form | Code | Structural Form | Code | ||
Liquid Level Linkage Discharge | Globe Type Straightway | 1 | Liquid Bottom Intermittent Discharge | Globe Type Straight Flow | 5 |
Globe Type Angle | 2 | Globe Type Straightway | 6 | ||
Globe Type Angle | 7 | ||||
Floating Gate Type Straightway | 8 | ||||
Unit Five: Sealing Pair Material
Material | Tin-Based Bearing Alloy Babbitt Alloy | Enamel | Nitriding Steel | 18-8 Stainless Steel | Fluoroplastic | Glass | Cr13 Stainless Steel | Lined Rubber | Monel Alloy | Nylon Plastic | Boronizing Steel | Lined Lead | Mo2Ti Stainless Steel | Plastic | Copper Alloy | Rubber | Hard Alloy | Valve Body Direct Processing |
Code | B | C | D | E | F | G | H | J | M | N | P | Q | R | S | T | X | Y | W |
When the sealing surface materials of the sealing pair differ, the code of the material with lower hardness is used.
Unit Six: Nominal pressure value is directly represented by Arabic numerals, which is 10 times the MPa.
Unit Seven: Valve Body Material
Valve Body Material | Titanium and Titanium Alloy | Carbon Steel | Cr13 Stainless Steel | Chromium Molybdenum Steel | Malleable Cast Iron | Aluminum Alloy | 18-8 Stainless Steel | Ductile Cast Iron | Mo2Ti Stainless Steel | Plastic | Copper and Copper Alloy | Chromium Molybdenum Vanadium Steel | Grey Cast Iron Mo2Ti Stainless Steel |
Code | A | C | H | I | K | L | P | Q | R | S | T | V | Z |
For low-pressure grey cast iron valves and medium-pressure steel valves, this item is omitted.
Example: Z543H-16C Bevel Gear Transmission Flange Connection Flat Gate Valve, Nominal Pressure 1.6MPa, Valve Body Material is Carbon Steel.
Other Brass Valves from JKL Brass Valve
