{"product_id":"asco-ef8551a005ms-explosion-proof-three-way-pilot-operated-solenoid-valve-with-manual-override","title":"ASCO EF8551A005MS Explosion Proof Three-Way Pilot-Operated Solenoid Valve with Manual Override","description":"\u003ch4 class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe ASCO EF8551A005MS is a pilot-operated three-way normally closed solenoid valve designed for reliable control of air and inert gas in industrial automation systems. Featuring an explosion-proof solenoid enclosure and a sustained manual operator, this valve provides dependable directional control for pneumatic actuators operating in hazardous locations. Its compact direct-mount design supports efficient installation in process control and valve automation applications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASCO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eValves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEF8551A005MS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolenoid Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8551\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePilot-Operated Spool Solenoid Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThree-Way Two-Position Normally Closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePort Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 Inch National Pipe Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNAMUR Direct Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Actuation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePilot Operated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Media\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAir, Inert Gas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBody Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExplosion Proof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManual Operator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSustained Screw Type (MS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoil Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120 Volts Direct Current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlow Coefficient (Cv)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.86\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Pressure Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 to 150 Pounds per Square Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About EF8551A005MS\u003c\/h4\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eThe EF8551A005MS is part of the ASCO Series 8551 family of pilot-operated spool valves engineered for pneumatic control of single-acting and double-acting actuators. It incorporates a three-way, two-position normally closed configuration with one-quarter inch National Pipe Thread ports, an explosion-proof enclosure, and a sustained manual override identified by the \"MS\" suffix. The valve is designed for direct mounting to NAMUR actuators and is suitable for compressed air and inert gas service in industrial environments. Its robust construction and standardized mounting arrangement make it widely used in chemical processing, oil and gas, power generation, and automated manufacturing systems. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThree-Way Normally Closed Operation: Controls pneumatic flow for spring-return actuator applications.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eExplosion-Proof Enclosure: Suitable for hazardous industrial environments requiring protected electrical components.\u003c\/li\u003e\n\u003cli\u003eOne-Quarter Inch National Pipe Thread Ports: Compatible with standard pneumatic piping installations.\u003c\/li\u003e\n\u003cli\u003ePilot-Operated Spool Valve: Provides smooth and reliable directional control using pilot pressure.\u003c\/li\u003e\n\u003cli\u003eSustained Manual Override: Allows manual valve operation during maintenance or electrical power loss.\u003c\/li\u003e\n\u003cli\u003eDirect NAMUR Mounting: Simplifies installation on quarter-turn pneumatic actuators.\u003c\/li\u003e\n\u003cli\u003eAir and Inert Gas Service: Designed specifically for clean pneumatic media.\u003c\/li\u003e\n\u003cli\u003eDurable Industrial Construction: Built for continuous operation in demanding automation systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe EF8551A005MS delivers the reliability and precision required for pneumatic actuator control and hazardous location automation applications.\u003c\/p\u003e","brand":"ASCO","offers":[{"title":"Default Title","offer_id":52367362490666,"sku":"EF8551A005MS","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/31ZFXUBNGDL.jpg?v=1787690311","url":"https:\/\/iqelectro.com\/products\/asco-ef8551a005ms-explosion-proof-three-way-pilot-operated-solenoid-valve-with-manual-override","provider":"IQElectro","version":"1.0","type":"link"}