Subscribe to Our Youtube Channel
Related Manuals for GEM 8257
Summary of Contents for GEM 8257
- Page 1 GEMÜ 8257 Electrically operated solenoid valve Operating instructions further information webcode: GW-8257...
- Page 2 All rights including copyrights or industrial property rights are expressly reserved. Keep the document for future reference. © GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG 16.10.2023 GEMÜ 8257 2 / 20 www.gemu-group.com...
-
Page 3: Table Of Contents
11.1 Inspection ............11.2 Cleaning ............11.3 Solenoid coil replacement ......11.4 Armature replacement ........11.5 Diaphragm replacement ....... 12 Troubleshooting ..........13 Disposal .............. 14 Returns ..............15 EU Declaration of Conformity ....... www.gemu-group.com 3 / 20 GEMÜ 8257... -
Page 4: Allgemeines
Lists Potentially dangerous situation! 1.3 Begriffsbestimmungen ▶ Non-observance can cause death or severe injury. Working medium The medium that flows through the GEMÜ product. CAUTION Potentially dangerous situation! ▶ Non-observance can cause moderate to light injury. NOTICE Potentially dangerous situation! ▶... -
Page 5: Safety Information
In cases of uncertainty: force. 15. Consult the nearest GEMÜ sales office. Switch position open When voltage is applied, the armature *702 is pulled against the pole surface of the bush. The medium pressure from the control chamber to the valve outlet is reduced thanks to the open pilot seat 2. -
Page 6: Correct Use
The product is designed for installation in piping systems and for controlling a working medium. 1. Use the product in accordance with the technical data. 2. Note the supplement acc. to ATEX 3. Please note the flow direction on the valve body. GEMÜ 8257 6 / 20 www.gemu-group.com... -
Page 7: Order Data
G 3/8, threaded socket DIN ISO 228 5 Valve body material CW617N (brass) 6 Seal material 7 Control function Normally closed (NC) 8 Voltage 230 V 9 Frequency 50 Hz 10 Special specification Without www.gemu-group.com 7 / 20 GEMÜ 8257... -
Page 8: Dimensions
Code G3: G 3/8, threaded socket DIN ISO 228 Code G4: G 1/2, threaded socket DIN ISO 228 Code N2: 1/4 NPT, threaded socket Code N3: 3/8 NPT, threaded socket Code N4: 1/2 NPT, threaded socket GEMÜ 8257 8 / 20 www.gemu-group.com... -
Page 9: Manufacturer's Information
4. Do not store solvents, chemicals, acids, fuels or similar Only operate the solenoid valve in flow direction. ● fluids in the same room as GEMÜ products and their spare Take precautionary measures in case of expected reverse ● parts. -
Page 10: Electrical Connection
2. Guide the cable through the cable gland 1, washer 2, rub- ber sleeve 3 and then through the plug housing 4. 3. Connect the cable. Connecting the cable Fig. 4: Connection to the terminal block Item Connection Supply voltage Supply voltage GEMÜ 8257 10 / 20 www.gemu-group.com... -
Page 11: Commissioning
Check the solenoid coil at regular intervals, depending upon the ambient conditions, for cracks and deposits of dirt and check the plug for secure location and good sealing. The operator is responsible for determining appropriate in- spection intervals. www.gemu-group.com 11 / 20 GEMÜ 8257... -
Page 12: Armature Replacement
10. Put on the distance piece. 10. Put on the solenoid coil. 11. Put on the solenoid coil. 11. Tighten the oval headed screws diagonally (hand tight). 12. Tighten the oval headed screws diagonally (hand tight). GEMÜ 8257 12 / 20 www.gemu-group.com... -
Page 13: Troubleshooting
Clean solenoid valve, fit strainer in front if necessary Armature blocked Clean the armature and bush, replace the armature if necessary Solenoid valve leaking Main valve seat leaking Clean main valve seat, replace diaphragm if necessary www.gemu-group.com 13 / 20 GEMÜ 8257... -
Page 14: Disposal
Valve bodies, valve covers in accordance with material identification Screws, armatures, bushes, as metallic core scrap compression springs O-rings, diaphragms, sealing as domestic waste type com- and plastic parts mercial waste Solenoid coil as electrical scrap GEMÜ 8257 14 / 20 www.gemu-group.com... -
Page 15: Returns
Returned goods can be processed only when this note is completed. If no return deliv- ery note is included with the GEMÜ product, GEMÜ cannot process credits or repair work but will dispose of the goods at the op- erator's expense. -
Page 16: Eu Declaration Of Conformity
15 EU Declaration of Conformity 15 EU Declaration of Conformity We, the company GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG Fritz-Müller-Strasse 6–8 74653 Ingelfingen-Criesbach, Germany declare that the product listed below complies with the following directives: • Low Voltage Directive 2014/35/EU •... - Page 17 15 EU Declaration of Conformity www.gemu-group.com 17 / 20 GEMÜ 8257...
- Page 18 GEMÜ 8257 18 / 20 www.gemu-group.com...
- Page 19 19 / 20 GEMÜ 8257...
- Page 20 GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG Fritz-Müller-Straße 6-8, 74653 Ingelfingen-Criesbach, Germany Subject to alteration Phone +49 (0) 7940 1230 · info@gemue.de www.gemu-group.com 10.2023 | 88291642...
Need help?
Do you have a question about the 8257 and is the answer not in the manual?
Questions and answers