Electric blind valve _ Pneumatic blind valve

Comprehensive compilation of technical parameters, application scenarios, and market data for electric and pneumatic blind valves:

1、 Product Definition and Core Features
Electric blind valve
Adopting electric push rod drive, supporting AC220V/380V power supply, equipped with intelligent control system (such as MODBUS RTU protocol), suitable for remote automation operation.
The valve body material is carbon steel or stainless steel (such as 310S), and the sealing ring is made of EPDM/NBR rubber, which can withstand temperatures up to 80 ℃ (EPDM) or 68 ℃ (NBR).
Pneumatic blind valve
Powered by compressed air (0.4-0.7MPa), it has a fast response speed and is suitable for explosion-proof environments.
The structure adopts a dual seal design (rubber sealing ring+metal hard seal), with a nominal pressure of 0.05-0.25MPa.
2、 Comparison of Technical Parameters
Parameter electric blind valve and pneumatic blind valve
Drive mode: Electric push rod (AC220V/380V) Pneumatic (0.4-0.7MPa)
Applicable temperature -30 ℃~80 ℃ (EPDM) -20 ℃~300 ℃ (metal seal)
Nominal pressure PN1.0-1.6MPa 0.05-0.25MPa
Diameter range DN40~DN2000 DN50~DN2000
Sealing performance leakage rate ≤ 0.5% Double sealing structure (rubber+metal)
3、 Typical application scenarios
Metallurgical industry
Blast furnace gas pipeline: Electric blind valve is used for remote cut-off, and pneumatic blind valve is used for rapid emergency shutdown.
Environmental Protection Engineering
Smoke treatment system: Pneumatic blind valve is compatible with explosion-proof requirements, and electric blind valve supports DCS integration.
Chemical industry field
Corrosive medium pipeline: Stainless steel valve body (such as 316L) is acid and alkali resistant, and electric/pneumatic drive is optional.
4、 Market data and manufacturer recommendations
Price range
Electric blind plate valve: DN600, approximately ¥ 3165-12800 per unit (Shanghai Guanhuan/Dengke Valve).
Pneumatic blind plate valve: DN500, approximately ¥ 2000~7600/set (Zhejiang Zhuochi/Yongjia Shengfa).
Manufacturer recommendation
Tianjin No.1 Standard: Leading in hydraulic/pneumatic blind valve technology, suitable for blast furnace systems.
Tianjin Yibiao: Supports non-standard customization and wear-resistant coating design.
Tianjin No.1 Standard: Electric push rod blind plate valve has high cost-effectiveness (starting from ¥ 408.5).

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