2/2-Way Solenoid Valve, Servo-assisted with Servo Diaphragm
Normally closed or open
Body material: brass
High flow rate
Compact design
Design/Function
Type 280 is a normally closed or normally open servo-assisted solenoid valve (circuit functions A and B).
For circuit function A, the valve is normally closed by spring action assisted by the fluid pressure. When de-energized, a pressure is built up above the servo diaphragm pressing it down to close the valve.When energized, the space above the servo diaphragm is exhausted via the pilot valve, the diaphragm is
lifted by the fluid pressure to openthe valve.
Circuit function B, normally open,provides the opposite function. It is important to note that the media is exhausted to atmosphere via the pilot operator when the valve is deenergised.The solenoid epoxy encapsulation efficiently dissipates the heat generated by the coil.
Applications
• Neutral gases and liquids
• Circuit function B for air orgases (consult for use withliquids)
• Sanitary applications
• Fire protection installations
• Irrigation systems
• Laundries
• Varnishing technology
• Machine tools (e.g. coolingwater)
Circuit Function
A 2/2-way valve, normally closed,with 2-way pilot control
B 2/2-way valve, normally open,with 2-way pilot control
Body Materials
Body of brass,Valve internals 1.4104, 1.4571
Type 0280
带有伺服隔膜和强制提升装置的先导式直通阀有两种类型，即在无流量时关闭或在无流量时打开。当作用方式 A 为关闭状态时，芯体会在弹簧力的作用下将先导式孔眼关闭。经由一个隔膜节流孔，在隔膜上方形成介质压力，进而关闭阀门。接通时，芯体先打开先导式孔眼。隔膜上方的关闭压力被卸除，且阀门由介质压力打开。为了完全打开阀门，所需的差压不能低于 0.5 bar。
紧凑型结构形式
0280型隔膜式电磁阀部分订货号如下：
025867 K 018981 P 066402 T 024519 M 066433 R 022201 V 019184 R 056747 H 020780 F 025077 N 018792 Z 069787 F 022238 Z 069809 N 069786 E 059675 L 064840 B 063940 E 069416 T 066357 C 064107 Z 064454 U 059681 B 069916 Y 055281 W 065963 T 088406 W 019994 M 064932 K 019853 X 066735 X
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