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Summary of Contents for GEM 687 SAK Stf 1
- Page 1 GEMÜ 687 SAK Stf 1 Wearing parts actuator Assembly instructions...
- 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 19.03.2025 GEMÜ 687 SAK Stf 1 2 / 11 www.gemu-group.com...
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Page 3: Table Of Contents
SAK spare parts kit ........4 Order data ............5 Replacing the spare parts ........Actuator disassembly ........Replacing the spare parts ......Mounting the actuator ........After the installation ........www.gemu-group.com 3 / 11 GEMÜ 687 SAK Stf 1... -
Page 4: General Information
Control medium The medium whose increasing or decreasing pressure causes the GEMÜ product to be actuated and operated. Diaphragm size Uniform seat size of GEMÜ diaphragm valves for different nominal sizes. GEMÜ 687 SAK Stf 1 4 / 11 www.gemu-group.com... -
Page 5: Safety Information
14. Do not carry out any maintenance work and repairs not de- piece 28 are used. scribed in this document without consulting the manufac- turer first. In cases of uncertainty: 15. Consult the nearest GEMÜ sales office. www.gemu-group.com 5 / 11 GEMÜ 687 SAK Stf 1... -
Page 6: Sak Spare Parts Kit
Optical position indicator Protective cap 3.2 SAK spare parts kit MG 40, MG 50 Item Piece(s) Components Lip ring Lock washer Actuator membrane Guide bush Hexagon nut Sealing washer or O-ring GEMÜ 687 SAK Stf 1 6 / 11 www.gemu-group.com... -
Page 7: Order Data
2 Diaphragm size Diaphragm size 25 3 Kit designation Wearing parts actuator 4 Control function Normally closed (NC) 5 Actuator version Actuator size F/N control air connector 90° offset to flow direction www.gemu-group.com 7 / 11 GEMÜ 687 SAK Stf 1... -
Page 8: Replacing The Spare Parts
Only use minimum required pressure. ● 6. Undo and remove the bolt and washer assemblies 12 between actuator top 10 and actuator base 16. 7. Slowly release the press. 8. Remove actuator top 10. 9. Remove spring set 7. GEMÜ 687 SAK Stf 1 8 / 11 www.gemu-group.com... - Page 9 Press guide bush 17 into actuator base 16 from above ● with an appropriate tool, ensuring that guide bush 17 is not damaged. 23. Grease actuator spindle 15 (GEMÜ recommends MOLY- COTE 111 COMPOUND). MG40_50 24. Insert the actuator membrane assembly by hand into actu- ator base 16 from above through guide bush 17 and push...
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Page 10: Mounting The Actuator
(the product must be fully open). ð Harmful foreign matter has been removed. ð The product is ready for use. 2. Commission the product. 3. Commission the actuators in accordance with the operat- ing instructions. GEMÜ 687 SAK Stf 1 10 / 11 www.gemu-group.com... - Page 11 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 03.2025 | 88959816...
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