Plastic ball valves, as important control components in pipeline systems, are widely used in various fields such as water treatment, chemical engineering, food and medicine. The correct selection of a model requires consideration of various factors such as material, connection method, pressure rating, temperature range, etc. This guide will systematically introduce the key points for selecting plastic ball valves, helping you make a reasonable choice.
Basic classification and standards for plastic ball valves
1. Main classification methods
Plastic ball valves can be classified according to different standards:
(a) By connection method:
Flange plastic ball valve: suitable for large-diameter pipeline systems
Threaded plastic ball valve: commonly used for small-diameter pipelines
Socket plastic ball valve: easy to install quickly
Double driven plastic ball valve: easy to disassemble and maintain
(b) By driving mode:
Manual ball valve: economical and practical
Pneumatic ball valve: automated control
Electric ball valve: precise adjustment
(c) By material:
UPVC ball valve: suitable for water treatment
PP ball valve: Food and pharmaceutical industry
PVDF ball valve: Strong corrosive medium
CPVC ball valve: High temperature environment
2. National standards and specifications
The main standards for plastic ball valves in China are as follows:
GB/T 18742.2-2002: Plastic ball valves suitable for DN15~DN400, rated pressure PN1.6~PN16
GB/T 37842-2019 “Thermoplastic Ball Valves”: Suitable for thermoplastic ball valves ranging from DN8 to DN150 and PN0.6 to PN2.5
3. Selection of sealing materials
EPDM ternary ethylene propylene rubber: acid and alkali resistant, temperature range -10 ℃~+60 ℃
FKM fluororubber: solvent resistant, temperature range -20 ℃~+95 ℃
PTFE polytetrafluoroethylene: resistant to strong corrosion, temperature range -40 ℃ to+140 ℃
Post time: Jul-22-2025