{"product_id":"spirax-sarco-sa121-self-acting-temperature-control-system","title":"Spirax Sarco SA121 Self-Acting Temperature Control System","description":"\u003cp\u003e\u003cb\u003eSpirax Sarco SA121 Self-Acting Temperature Control System\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eThe Spirax Sarco SA121 is a self-acting temperature control system that maintains a set temperature automatically, with no electrical or pneumatic power required. Using a liquid-filled capillary tube and brass sensor, the system detects changes in process temperature and modulates a connected control valve accordingly. A kerosene-filled sensing element drives the actuator directly, making the system entirely self-contained. The blue polypropylene adjustment knob allows for straightforward setpoint changes across a temperature range of -15°C to +50°C. The 4 m copper capillary, clad in PVC-armoured covering, gives enough reach to position the sensor accurately within the process fluid while keeping the actuator close to the valve. Compatible with Spirax Sarco 2-port and 3-port temperature control valves, the SA121 suits both heating and cooling duties. It complies with the EU Pressure Equipment Directive and UK Pressure Equipment (Safety) Regulations, and is rated for Group 2 fluids including steam, water, and compressed air. Weight is approximately 2.0 kg.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHVAC and building services heating systems\u003c\/li\u003e\n\u003cli\u003eHeat exchangers\u003c\/li\u003e\n\u003cli\u003eHot water generation systems\u003c\/li\u003e\n\u003cli\u003eSteam-heated process equipment\u003c\/li\u003e\n\u003cli\u003eFood and beverage processing\u003c\/li\u003e\n\u003cli\u003ePharmaceutical and industrial process plants\u003c\/li\u003e\n\u003cli\u003eHeating and cooling control applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eSummary:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSelf-acting operation — no electricity or pneumatic supply needed\u003c\/li\u003e\n\u003cli\u003eTemperature range: -15°C to +50°C\u003c\/li\u003e\n\u003cli\u003e4 m copper capillary with PVC-armoured covering\u003c\/li\u003e\n\u003cli\u003eKnob-adjustable setpoint\u003c\/li\u003e\n\u003cli\u003eBrass sensor and actuator; polypropylene adjustment head; steel mounting bracket\u003c\/li\u003e\n\u003cli\u003eKerosene-filled sensing element\u003c\/li\u003e\n\u003cli\u003eCompatible with Spirax Sarco 2-port and 3-port temperature control valves\u003c\/li\u003e\n\u003cli\u003eCompliant with EU PED and UK Pressure Equipment (Safety) Regulations\u003c\/li\u003e\n\u003cli\u003eRated for Group 2 fluids: steam, water, compressed air, and other non-hazardous fluids\u003c\/li\u003e\n\u003cli\u003eManufactured under ISO 9001 quality management systems\u003c\/li\u003e\n\u003cli\u003eWeight: approximately 2.0 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Flocon","offers":[{"title":"2m","offer_id":58523031994752,"sku":"40.3810090","price":1449.41,"currency_code":"GBP","in_stock":true},{"title":"4m","offer_id":58523032027520,"sku":"40.3810091","price":1491.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0524\/4531\/5228\/files\/Spirax_20Sarco_20SA121_20Self-Acting_20Temperature_20Control_20System.jpg?v=1784858831","url":"https:\/\/www.flocon.co.uk\/products\/spirax-sarco-sa121-self-acting-temperature-control-system","provider":"Flocon Valves Pipes \u0026 Fittings","version":"1.0","type":"link"}