Rubber lined ball valve
Detailed analysis of rubber lined ball valve:
1、 Core Structure and Technical Characteristics
Lining layer design
Lined with rubber materials such as butyl rubber and ethylene propylene diene monomer (EPDM), with a thickness of usually 3-5mm, it is tightly bonded to the metal valve body through vulcanization process, with a bonding strength of ≥ 588.4N/cm2. PTFE lining can be used for special working conditions, with a temperature resistance of up to 200 ℃.
Sealing system
Floating ball structure design, with the ball and valve seat forming a dual channel seal
The valve stem adopts a V-shaped PTFE packing combination to achieve zero leakage (leakage level VI)
Drive mode
Supports multiple driving forms such as manual, pneumatic (such as D641J-10Q model), electric (such as Q911F-16S), etc., with a pneumatic response time of ≤ 0.5 seconds
2、 Comparison of mainstream product parameters
Model, diameter range, pressure rating, applicable medium, typical price
Q41F46 DN50-300 PN1.6 Acid alkali salt 85-100 yuan
D641J-10Q DN80 PN1.0 desulfurization slurry, seawater 750 yuan
Q911F-16S DN15 PN1.6 Corrosive Fluid 279-439 yuan
3、 Typical application scenarios
Chemical industry: Processing strong corrosive media such as hydrofluoric acid and 30% sulfuric acid
Environmental engineering: slurry control for flue gas desulfurization system, lined with EPDM rubber for wear resistance
Food and Pharmaceutical: Compliant with GMP certification, used for sterile fluid transportation
4、 Selection precautions
Medium characteristics: Strong oxidants (such as nitric acid) require the use of fluororubber lining
Temperature compensation: If the temperature exceeds 120 ℃, an elastic valve seat must be installed
Installation and maintenance: It is recommended to use a clamp type connection for easy online maintenance
选型建议
