Elektrogas Limit switch contact 6 Bar for VMRNA-60

PCS Position indicator switch VI Visual position indicator for valves and actuators delta-elektrogas.com EE170 – 0421  ELEKTROGAS – datasheet EE170 - 0421 PCS - VI Position indicator for valves and actuators Contents Description ............................................................................................................. 2 Features................................................................................................................. 2 Functioning and application ................................................................................... 3 Technical specifications ......................................................................................... 5 Ordering information .............................................................................................. 6 Standards and approvals ....................................................................................... 6 Description The PCS is a mechanically activated switch for monitoring the position of the valve plate. This device can be fitted to Elektrogas aluminium valves series VMR, VML, VMM, VMH, EVRM- NA, EVRM-6NA, EVRM-NC, EVRM-6NC to check the closed position of the plate. It can be fitted to the N.O. vent valve VMRNA to check the open position of the plate. It can be also fitted to solenoid actuators (SR - SL - ST) to check the open/closed position of the butterfly valve (VF - VFH). The VI is a mechanically activated indicator for monitoring externally the position of the valve plate. This device can be fitted to Elektrogas aluminium valves series VMR, VML, VMM, VMH, EVRM-NA, EVRM-6NA, EVRM-NC, EVRM-6NC: when red indicator is visible, valve is open, when indicator is blind, valve is closed. Features PCS and VI are available with working pressure 500mbar, 2bar or 6bar. These devices can be fitted to Elektrogas valves provided with G1/8 threaded hole on the bottom. This connection is present as standard for valves DN65 or bigger. For models DN50 or smaller, it must be required in the order. Vent valve VMRNA are always equipped with G1/8 hole on the top for open position indicator. Solenoid actuator SR, SL or ST have to be manufactured with a special execution for assembling the indicator and it shall be required in the order. An adapting rod is necessary to fit the indicator to an Elektrogas valve or actuator. The indicator is supplied with the rod already mounted, to make installation easier. The switch can be rotated on 360° on rod axis. PCS Electrical connection with ISO4400 plug. They are suitable for air and non-aggressive gases (families 1-2-3 EN437). Special versions are available for use with aggressive gases. The compact, robust and functional design permits a simple and quick installation, and it is essentially maintenance free. All components are designed to withstand mechanical, thermal and chemical stresses present in a typical installation. PCS can be provided in Ex-proof execution, for use in Zones 2 and 22, according to 2014/34/UE Directive (ATEX). PCS and VI are 100% tested for seal and functioning. WARNING This device shall be installed in accordance with the laws in force. 2-7  ELEKTROGAS – datasheet EE170 - 0421 Functioning and application The PCS is a mechanically activated switch for monitoring the position of the valve plate. In a normally closed valve (Fig.2 shows a PCS installed in a VMR valve), when valve is not energized, plate is in contact with valve seat. Switch rod is pushed and the electric contact is switched in configuration 1-3. When valve opens, plate leaves seat and frees the rod, so that contact switches in configuration 1-2, under the action of a return spring. The EN 161 standard specifies that switch has to commute when plate is within 1 mm to its closed position, so PCS is a device able to detect the closed status, not the completely open one. Fig. 1 shows how contacts commute in a VMR valve. Fig. 1 Fig. 2 Fig.3 shows PCS mounted on a solenoid actuator. In this case minimum and maximum regulation are not available and mounting of open position switch is possible only with SR type (fast opening-fast closing). CLOSED POSITION SWITCH OPEN POSITION SWITCH Fig. 3 3-7  ELEKTROGAS – datasheet EE170 - 0421 In normally open valve VMRNA, PCS is mounted over the stem. When valve is not energized (open), disc is open and the magnetic core pushes the switch rod, so electric contact is switched in configuration 1-3. When valve is energized (closed), magnetic core pushes disc on seat and frees the PCS rod, so that contact switches in configuration 1-2. Fig. 4 VI is similar to PCS, but switch is replaced with a red indicator. In a normally closed valve (Fig.5 shows a VI installed in a VMR valve), when valve is not energized, plate is in contact with seat and VI rod is pushed, so red indicator is blind. When valve opens, plate leaves seat and frees the rod, so that red indicator is visible. R e t WARNING e Location G and mode of installation must be in compliance with local rules in force. a s 4-7  ELEKTROGAS – datasheet EE170 - 0421 Technical specifications Tab. 1 Connection G1/8 (ISO 228-1) Max operating pressure 500 mbar 2 bar 6 bar Max testing pressure 0.75 bar 3 bar 9 bar Environmental temperature -15°C / +60°C Installation See valve instruction sheet for the correct position Gas type Air and non aggressive gases (fam. 1-2-3 EN 437) Special versions for aggressive gases Materials in contact with media Aluminum, Brass, Stainless steel NBR, PTFE, FPM (Special versions for aggressive gases without brass and NBR) PCS - switching capacity Standard Silver contact Resistive Load Inductive Load/ Lamp 250VAC 2A 250VAC 0.3A 125VAC 3A 125VAC 0.5A 30VDC 3A 30VDC 1A Special Gold plated contact: Resistive Load Inductive Load/ Lamp 125VAC 0.1A --- 30VDC 0.1A --- PCS - electrical connection ISO 4400 plug with PG11 cable gland PCS - enclosure IP54 (EN 60529) optional IP65 Weight VI 0,070 Kg PCS 0,200 Kg PCS Ex-proof version 0,300 Kg H depending on which valve/actuator is to be mounted. Fig. 5 5-7  ELEKTROGAS – datasheet EE170 - 0421 Ordering information Tab. 2 - PCS 6 .X Pmax - 500 mbar * 2 2 bar 6 6 bar ** PCS position indicator switch VI visual position indicator Rod type 1 for VMR0/1 EVRMNA0/1 EVRMNC0/1 3 “ VMR2/3 EVRMNA2/3 EVRMNC2/3 4 “ VMR35/4 EVRMNA35/4 EVRMNC35/4 4F “ VMR4.F EVRMNA4.F EVRMNC4.F 6 “ VMR6 EVRMNA6 EVRMNC6 8 “ VMR7/8 EVRMNA7/8 EVRMNC7/8 9 “ VMR9 EVRMNA9 EVRMNC9 95 “ VMR93/95 EVRMNA93/95 EVRMNC93/95 98 “ EVRMNA98 EVRMNC98 98S “ EVRMNA98.S EVRMNC98.S 910 “ EVRMNA910 EVRMNC910 912 “ EVRMNA912 EVRMNC912 M3 “ VMM20/25 M6 “ VMM32/40/50 M8 “ VMM65/80 HP “ VMH (all models) RA “ VMRNA (open position of N.O. valve) S “ SR-L-T (closed position) S4 “ SR4 (open position) S8 “ SR8 (open position) Special…