SP405 - Somas

SP405 Valve positioner

Datasheet Valve positioner Type SP405 Type SPE405 Pneumatic Electro-pneumatic Si-805 EN Edition: 2010-04 • High accuracy • High capacity visual position • Clear indication resistance to • Good vibration • Easy setting The SOMAS pneumatic positioner type SP405 (20 – 100 kPa) and the electro-pneumatic type SPE405 (4 – 20 mA) are developed to meet t.

Features

*) acts on a diaphragm (41) and via the balance arm (46) the pilot valve (40) is controlled. When the input signal increases, the pilot valve distributes supply air to one side of the piston while the other side is vented. The cam disc (32), which is adjustable to the shaft (26), transmits the rotary motion of the actuator to the feed-back arm (35). The feed-back arm acts on the feed-back spring (53) and when there is a balance between the force from the diaphragm and the force from the feed-back spring, a new balanced position is established. Range adjustment is done with the adjustment screw.