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YT-420 / YT-430 Series Lock-Up Valve (Air Lock Valve)


Function:	Double Acting Single Acting
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The double - acting air lock up valve is a sophisticated gas - control device that operates through a dual - pressure mechanism. Unlike single - acting valves, it utilizes air pressure from two directions to drive its opening and closing operations. When air pressure is applied to one side, the valve opens to allow gas flow; by switching the air pressure to the opposite side, the valve can be precisely closed. This bidirectional actuation enables more accurate and flexible control over gas flow, making it an ideal choice for complex industrial processes, high - precision pneumatic systems, and applications that demand rapid and reliable gas isolation. With its robust construction and advanced design, the double - acting air lock valve ensures stable performance under various working conditions.

Model:
YT420
Brand:
WAALPC
Code:
8481901000

Product Description

Compact & Lightweight: Small size and light weight allow direct connection to metal pipes without the need for an additional mounting bracket.
High Sensitivity: Detects small pressure variations below 0.01 MPa (0.1 kgf/cm²).
Corrosion Resistant: Coated with epoxy resin paint (or epoxy polyester spray coating) for excellent corrosion resistance .
Optional Monitoring: Can be equipped with limit switches and position indicators to monitor the valve's open/close status.
Built-in Protection (YT-430): Features a built-in 100-micron filter to prevent foreign particles from entering and damaging the diaphragm.
100% Interchangeability: Direct replacement for major international brands including Rotork YTC – same dimensions, same connections, same performance.

Technical Parameters

ORDERING CODE

YT420

DATA SHEET

Model	YT-430S	YT-430D	YT-435S	YT-435D	YT-420S	YT-420D	YT-425S	YT-425D
Max. input/output pressure	Max. 1.0MPa(10bar)
Max. signal pressure	Max.0.7MPa(7bar)
Pressure setting range	0.14MPa~0.7MPa(1.4~7bar)
Flow coefficient	1.8				2.6
Port size	NPT3/8				NPT1/2
Signal pressure port size	NPT1/4
Action differential pressure	Lower than 0.01MPa(0.1bar)
Hysteresis	1%
Temperature range	-20~70℃, -20~120℃, -40~70℃, -55~70℃
Material	Aliminum alloy		stainless steel 316		Aluminum alloy		stainless steel 316
Weight	1.5kg	2.6kg	3.5kg	6.5kg	1.5kg	2.6kg	3.5kg	6.5kg

OVERALLDIMENSION&STRUCTURE

YT420

Specification Download

YT420 430 Air Lock Up Valve.pdf

Superiority

Why choose us? What can we do for you?

♦ Founded in 2011 and professional experienced in the field of producing pneumatic products for over 13+ years.
♦ We have strong production capacity, over 100000 pcs/month.
♦We have rich experience for offering OEM/ODM service
♦ We have strict quality control process with quick response of after sales service.
♦ Management system certification : ISO9001,CE, ROHS
♦ We have 10+ technical experts for researching and developing.
♦ Sales network expands from domestic sales to all over the world.