Because there are many types of ball valves, the connection forms, drive forms and models are different. What do the model letters of ball valves represent? The expression of the model code of ball valves mainly includes the additional code of ball valves, the name code of ball valves, drive mode, connection form, structural form, sealing material, pressure level and valve body material. Let's learn about it together.
Meaning of ball valve model codes
Meaning of ball valve additional codes
Q stands for ball valve, V stands for valve, which is generally used to refer to all types of valves, but may also appear in the relevant codes of ball valves, B stands for pneumatic, indicating pneumatically driven ball valves, E stands for electric, indicating electrically driven ball valves, H stands for manual, indicating manually operated ball valves, L stands for hydraulic, representing hydraulically driven ball valves, S stands for explosion-proof, indicating explosion-proof ball valves, T stands for ball material (such as high temperature ball valve Temperature), P stands for pressure, which is often used to indicate pressure control or specific pressure level ball valves, F stands for regulation, indicating flow control or regulating ball valves, and N stands for ordinary, indicating conventionally designed ball valves.
Meaning of ball valve name codes
Gate Valve: GV is commonly used or Chinese Z is retained (manufacturer code may be used in international projects)
Globe Valve: abbreviated GL, but Chinese code J is still common in international procurement documents
Ball Valve: B is internationally used, but Chinese code Q may appear in products in the Asian market
International representation of special types
Butterfly Valve: B is internationally used, but D in Chinese standards
Safety Valve: SV is internationally used, Chinese code A
General parameter codes in international standards
In addition to the type, the valve model also contains information such as connection method and pressure level. The following are international general parameter codes:
Nominal diameter (DN) and pressure (PN)
DN (Nominal Diameter): Indicates the valve diameter, such as DN50 indicates a diameter of 50mm
PN (Pressure Nominal): Indicates the nominal pressure, such as PN16 corresponds to 1.6MPa
Connection method code
RF: Raised Face
FF: Flat Face (Flat Flange)
WN: Welding Neck (Butt Weld)
SW: Socket Weld (Socket Weld)
Material Code
CF8M: Austenitic stainless steel of ASTM standard (corresponding to 316 stainless steel)
WCB: Carbon steel casting (A216 Gr.WCB)
LCC: Low temperature carbon steel
International Organization for Standardization (ISO) and regional standards.
The standard systems in different regions have different specifications for valve codes:
ISO 5208: Industrial valve pressure test standard, which does not directly specify the type code, but requires the model to be marked with DN, PN and material code
API standard (American Petroleum Institute)
API 600: Steel gate valve standard, the model may contain G (Gate) logo
API 6D: Pipeline valve standard, covering ball valve (B), plug valve (P), etc.
EN 1092: Flange connection standard, used with DN and PN
EN 12266: Valve test standard, emphasizing sealing grade marking (such as A, B, C)
Precautions in practical application
Mixed use of codes
In international projects, valve models often use mixed multinational standard codes. For example:
Z41Y-16C (Chinese standard): indicates a gate valve with flange connection, carbide seal (Y), and carbon steel body (C)
API 600 Gate Valve DN150 PN40: indicates an API standard gate valve, with a diameter of 150mm and a pressure rating of 4.0MPa
Meaning of the pressure rating code for ball valves
16 indicates a pressure of 16 kg (1.6Mpa) and a maximum pressure of 64Mpa;
150LB indicates American standard pound pressure, with a maximum pressure rating of 2500LB (150LB=1.6MPA/300LB=2.5-4.0mpa/400LB=6.4mpa/600LB=10mpa);
5K indicates daily pressure, with a maximum pressure of 63K.
Meaning of ball valve body material code
A represents titanium and titanium alloy; C represents carbon steel; I represents chrome-molybdenum steel; P18-8 is stainless steel; RMo2Ti is stainless steel; S represents plastic.
Commonly used ball valve models
Three-way ball valve model: DQF-B-321, DQF-B-315*DQQ-B1K3-220
Stainless steel ball valve model: DQF-B-G225
Wafer ball valve model: DQF-B-225*DQQ-B1M1-24AC, DQF-B-W620*DQQ-B3K-05-220
Comparison pictures
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