Solutions for a world in motion Position indication for manually operated valves 777it switching device WSH 10.2- WSH 16.2/WSHEx 10.2- WSHEx 1 Product description

Applications Power Water industry : Conventional power plants (coal, gas, oil) : Hydroelectric power plants : Geothermal power plants : Solar thermal power plants : Bio gas power stations : : : : : Oil & gas Industrial and special solutions : : : : : 2 | Exploration, offshore plants Refineries Distribution Gas tanks Tank farms Sewage treatment plants Water treatment plants Drinking water distribution Seawater desalination Steel construction for water resources : Air conditioning : Food industry : Chemical/pharmaceutical industry : Vessel and submarine ship building : Steel mills : Paper industry...

2012.05.15 Solutions for a world in motion AUMA actuators provide reliable information on the valve position - locally via a position indicator and via remote position signal in the control room. Automation of the valve might not be necessary, but accurate information on valve position is required. The WSH limit switching device is perfectly suited for these applications. The device provides the user with the required information for target-oriented action. The WSHEx version is approved for use in potentially explosive atmospheres. For detailed product selection, please refer to the separate...

[1] [2] [3] Modular design - suitable for all valve types The WSH perfectly fits into AUMA's modular product range. Different output drive types or the combination with an AUMA gearbox ensure that the device can be adapted to any valve type. The torque ranges of the different devices are adapted to each other. Standard flanges and output drive types facilitate the assembly of the various devices. [1] WSH mounted on stem gate valve with rising stem The output flange of the WSH is fitted with an output drive type A containing a stem nut. The rising stem is passed through the hollow output shaft...

[4] [5] [6a] [6b] [4] WSH with GS part-turn gearbox mounted on a ball valve In combination with a GS gearbox, the WSH can also be used on part-turn valves such as ball valves and butterfly valves. The WSH is screwed to the input flange of the GS gearbox. The GS gearbox has a high reduction ratio. When using primary reduction gearings with the worm gearbox, the manual forces at WSH can be additionally reduced. [5] WSH with LE linear thrust unit mounted on a shut-off valve In the same way as with other gearboxes, the WSH can also be combined with AUMA LE linear thrust units. Thereby, the WSH is...

Design principle - Functions [1] Valve attachment According to EN ISO 5210 or DIN 3210. Various output drive types are available. [4] [2] Hollow output shaft Rising stems pass through the hollow shaft. The torque is transmitted from the handwheel to the hollow shaft via splines. [3] Handwheel The handwheel is available with different diameters. The handwheel is fitted on the splines of the hollow shaft and secured with a snap ring. As standard, the handwheels are equipped with a ball handle. [5] [8] [7] [6] [4] Screw plug For non-rinsing stems, the handwheel hole is sealed with a screw plug....

[7] Mechanical position indicator The mechanical position indicator allows for reliable reading of the current valve position, even if the valve is either not equipped with a position indicator or if the valve position indicator is difficult to access. [3] [2] [1] [9] [6] Electronic position transmitter RWG (option) The RWG converts the current valve position in a 0/4 – 20 mA current signal. This signal is connected to the WSH electrical connection and can be transmitted from there to the control room. The RWG can be configured for 2-wire, 3-wire or 4-wire configuration. [8] Electrical plug/socket...

AUMA actuators are used worldwide; in all climate zones, in industrial plants of all kinds under special local ambient conditions. AUMA devices have to operate reliably and for a long time under any conditions without requiring major maintenance work. For this reason, AUMA has focussed on making AUMA devices resistant to the most unfavourable conditions and has adapted protective measures to the state-of-the-art technology. Service conditions 8 | Enclosure protection IP 67 AUMA device conform to enclosure protection IP 67 according to EN 60529. IP 67 means protection against immersion up to 1...

Corrosion protection Standard (KN) The standard AUMA corrosion protection KN is a high quality coating. This is suitable for outdoor installation and for slightly aggressive atmospheres with a low level of pollution. Ambient temperatures WSH –40 °C to +80 °C WSHEx –40 °C to +60 °C KS AUMA recommends this corrosion protection class for installation in occasionally or permanently aggressive atmospheres with a moderate pollutant concentration. KX AUMA recommends this corrosion protection class for installation in extremely aggressive atmospheres with high humidity and a high pollutant concentration....

Technical data Reduction ratio Limit switches Single switch Tandem switch (option) Triple switches (option) For switching two different potentials. The switches have two compart- ments with galvanically isolated switches in a common sealed housing. The two switches are operated together; one switch is leading and should be used for signalisation. For applications where three different potentials are to be switched. The switch consists of one single and one tandem switch. Three NC and three NO contacts With gold-plated contacts (recommended for controls with Contacts - other features Contact element...

Electrical connection AUMA plug/socket connector - not Ex No. of contacts max. Designation Connecting voltage max. Type of customer connection Cross section max. Material - pin socket carrier Material - contacts Protective earth 1 (leading contact) PE – Screw for ring lug 6 mm2 Polyamide Brass Control contacts 50 pins/sockets 1 to 50 250 V Screw, crimping (option) 2.5 mm2 Polyamide Brass, tin plated or gold plated (option) Terminal frame with terminal blocks - explosion-proof No. of contacts max. Designation Connecting voltage max. Type of customer connection Cross section max. Protective earth...