datasheet si-805 en valve positioner edition: 2010-04 type sp405 pneumatic type SPE405 electro-pneumatic the somas pneumatic positioner type sp405 (20 C 100 kpa) and the electro-pneumatic type SPE405 (4 C 20 ma) are developed to meet the demands from the process industry. the somas positioners are intended for a rotary motion up to 90. they are developed for quarter turn actuators and valves but can easily be adapted for actuators with a linear motion. a number of different cam discs are available to cover various signal ranges, angles of rotation and valve characteristics. all cams discs are for a rotary motion of 60-90. other types of cam discs on request. high accuracy ? high capacity ? clear visual position ? indication good resistance to ? vibration easy setting ? type sp405 type SPE405 http://www..net/ datasheet pdf - http://www..net/
2 fig.1 sp405 fig.2 SPE405 40 41 46 53 7 35 32 26 50 35 32 26 50 31 41 46 53 7 113 106 117 40 edition: 2010-04 si-805 en function sp405 (pneumatic type) a pneumatic input signal (20-100 kpa bar*) 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 (7). the zero-point can be adjusted from the outside by the screw (50). * 20-100 kpa = 0.2-1 bar = 3-15 psi SPE405 (electro-pneumatic type) the function of the SPE405 is based upon the pneumatic positioner which has been fitted with an i/p-converter. the converter is housed in a separate box on the pneumatic part. function of the i/p-converter the electric input signal 4-20 ma goes to the coil (117) and creates a magnetic force which influences the flapper (106). with an increasing input signal the flapper moves closer to the nozzle (113) and the pressure acting on the diaphragm (41) increases. the adjustment of range and zero is performed in the same way as for sp405. http://www..net/ datasheet pdf - http://www..net/
3 si-805 en edition: 2010-04 installation rotary motion the transmission of the rotary motion between actuator and positioner is of a new design. no extra parts are needed for mounting the positioner sp/SPE405 on the actuator type a. mounting on a standard actuator a mounting block is used as a standard solution to mount the positioner to the actuator. when the mounting block is used a lower type of driver is required. the block is fitted to the bottom side of the posi - tioner with screws and mounted on the actuator by using guide pins on the actuator cover. (nuts are secured to avoid that they get lost when changing i.e. a positioner.) see data sheet si-806 for additional mounting block information. setting the setting of range is done with the adjustment screw (7). the zero-point can easily be adjusted from the outside by means of a screwdriver on screw (50). to reach the zero-point screw the cover (31) has to be opened (see the manual mi-805). tubing the tubing between positioner and actuator is to be made with plastic tubes. stainless steel tubing is available as an option. material specification detail material housing aluminium, duasolid painted cover polycarbonate balance arm stainless steel feedback arm steel, chromated cam disc stainless steel feed-back spring spring steel, chromated pilot valve stainless steel diaphragm silicone rubber ordering example positioner type SPE405 characteristic: linear control signal: 4-20 ma for actuator type technical specification sp405 SPE405 control signal standard 20-100 kpa 4 - 20 ma control signal split range 20-60 kpa 60-100 kpa 4 - 12 ma 12 - 20 ma air consumption (at balance and 6 bar supply pressure) max 10 nl/min max 15 nl/min air capacity (at 6 bar supply pressure) 450 nl/min approx. ca. 450 nl/min approx. max voltage drop C 8,6 v at 20 ma cam discs linear 0 - 90 0 - 90 cam discs equal percentage 0 - 60, 0 - 90 0 - 60, 0 - 90 connections g 1/4 g 1/4 supply pressure 4-8 bar 4-8 bar ambient temperature -40 to +100 c -40 to +100 c hysteresis 0,5 % 1 0,5 % 1 repeatability < 0,5 % 1 < 0,5 % 1 input resistance C 430 ohm weight 1,5 kg 2,3 kg supply air according to iso 8573-1 class 3 according to iso 8573-1 class 3 protection class C equivalent to ip65 1 of chosen control signal http://www..net/ datasheet pdf - http://www..net/
0 0 30 30 60 60 90 90 0 0 30 30 60 60 90 90 37 17.5 130 130 g1/4" g1/4" g1/4" 32 79 112. 5 17.5 130 68 120 45 79 78 112.5 24.8 21 ?5 0 ?12 g1/4" 14.2 4.8 4 2.8 m6 ?5 0 m6 17.5 g1/4" 24.8 ?12 g1/4" g1/4" 86 140 4 4 edition: 2010-04 si-805 en dimensions somas reserves the right to make improvements without prior notice. box 107 se-661 23 s?ffle sweden phone: +46 533 167 00 fax: +46 533 141 36 e-mail: sales@somas.se www.somas.se http://www..net/ datasheet pdf - http://www..net/
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