{"product_id":"1-1-2-watson-mcdaniel-w94-10-08s15-h16n-direct-operated-temperature-regulators-for-heating-with-steam-die-cast-aluminum-housing-200-280-f-heating-temperature-indicating-dial-3-1-2-npt","title":"1-1\/2\" Watson McDaniel W94-10-08S15-H16N Direct-Operated Temperature Regulators (For Heating With Steam), Die-Cast Aluminum Housing, 200 - 280°F (Heating), Temperature Indicating Dial (3-1\/2\"), NPT","description":"\u003ch2\u003eWatson McDaniel W94-10-08S15-H16N Direct-Operated Temperature Regulators For Heating With Steam, 200 - 280°F Indicating (1-1\/2\" NPT)\u003c\/h2\u003e\u003ch2\u003eFeatures:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSelf-Operating (No External Power Source Required)\u003c\/li\u003e\n\u003cli\u003eTemperature Indicating \u0026amp; Non-Indicating models available.\u003c\/li\u003e\n\u003cli\u003eHeavy Duty Die-Cast Aluminum Housing\u003c\/li\u003e\n\u003cli\u003e1\/2\" Thru 4\" Valve Sizes\u003c\/li\u003e\n\u003cli\u003eFully Enclosed Bellows\u003c\/li\u003e\n\u003cli\u003eTemperature Over-range protection spring to protect thermal system.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOptions \u0026amp; Features (See Specification Sheet For Full List):\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eW94 Series For Heating With STEAM\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDirect-Acting: \u003c\/strong\u003eNormally Open Valves are used for heating with STEAM. The actuators are designed to move the valve stem closed (In-To-Close) as the control signal (Temperature) increases.\u003c\/p\u003e\u003cp\u003eThe W91 \u0026amp; W94 Self-Operating Temperature Regulators are the preferred choice of original equipment manufacturers, mechanical contractors and specifying engineers. They require no external power source and are ideal for regulating the temperature of tanks, process streams and various types of industrial equipment. The Actuator is noted for its rugged die-cast aluminum housing, fully-enclosed bellows assembly and internal over-temperature range protection.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel W91 Non-Indicating (Without Indicating Dial) features a lower profile and should be specified where space constraints may be an issue.\u003c\/li\u003e\n\u003cli\u003eModel W94 Temperature Indicating (With Indicating Dial) will allow the operator to verify the process temperature and to aid in temperature adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003cbr\u003eThe recommended working span typically falls within the upper third of the nominal range. Single-Seat In-To-Close, all Double-Seat, and all 3-Way valves have a recommended working span in this part of the nominal range. Using the valve in the recommended working span improves temperature response time of the system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCapillary \u0026amp; Sensing Bulb\u003c\/strong\u003e\u003cbr\u003eThe sensing bulb and capillary are available in Copper (best heat transfer properties) or Stainless Steel (for corrosive applications). Copper has better heat transfer properties than stainless steel and should always be chosen for better temperature control unless used in corrosive service. The length of the sensing bulb is dependent upon the capillary length required (see chart). Longer capillary lengths require a longer length sensing bulb to operate the regulator. For installation, the Union Hub is threaded into a tank or piping system. The bulb slides through the Union Hub and is held in place by the Union Nut which spins freely around the armored capillary and threads into the Union Hub. The angled surface of the sensing bulb forms a metal-to-metal seal on the inner edge of the Union Hub to prevent leakage of the process fluid.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOptional Thermowell\u003c\/strong\u003e\u003cbr\u003eThermowells isolate and protect the sensing bulb from the process fluid, and are available in either Brass (best heat transfer) or Stainless Steel (for corrosive applications). Thermowells allow for sensing bulb removal and replacement without having to drain liquid from the system. To maintain the best temperature control, always use a Copper Sensing bulb as opposed to a Stainless Steel sensing bulb. For corrosive applications, Stainless Steel thermowells (with a copper sensing bulb) can be used. Thermowells are also recommended for applications with excessive system pressures or extremely turbulent flow to protect the sensing bulb from damage.\u003c\/p\u003e\u003cp\u003eThermowell Length must be selected based on the length of the sensing bulb. The sensing bulb length is based on the length of the Capillary used in the Thermal System. Longer capillary lengths require a longer sensing bulb to hold the additional actuator fluid inside the sensing bulb. Reference Sensing Bulb Chart for sensing bulb length.\u003c\/p\u003e\u003ch2\u003eHow It Works\u003c\/h2\u003e\u003cp\u003eThe W91\/W94 Temperature Regulator is a fully self-contained unit requiring no external power source (i.e., compressed air or electricity). Regulation takes place when the sensing element (bulb) of the thermal system is exposed to changes in temperature. The thermal system is charged with a predetermined amount of vapor fill, which, when heated, will cause the bellows within the unit’s actuator housing to expand. The valve action is either In-To-Close for Heating or In-To-Open for Cooling.\u003c\/p\u003e\u003cp\u003eNormally Open Valves are used for \u003cstrong\u003eHEATING\u003c\/strong\u003e, so the valve stem closes (In-To-Close) as the control signal (Temperature) increases.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSingle-Seated Balanced Valves\u003c\/strong\u003e are used for Heating Applications (normally steam) where tighter shut-off is required. Leakage rate is approximately 0.01% of the maximum capacity (Class IV Shut-Off).\u003c\/p\u003e\u003ch2\u003eSelection \/ Sizing \/ Capacities\u003c\/h2\u003e\u003cdiv style=\"clear: both;\"\u003e\u003cp\u003e\u003cstrong\u003eActuator Selection:\u003c\/strong\u003e The recommended working span for W91 \u0026amp; W94 Actuators typically falls within the upper third of the nominal range. Single-Seat In-To-Close, all Double-Seat, and all 3-Way valves have a recommended working span in this part of the nominal range. Using the valve in the recommended working span improves temperature response time of the system.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv style=\"clear: both;\"\u003e \u003c\/div\u003e\u003cdiv class=\"tech\"\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv class=\"specs\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eModel\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003eW94 (Temperature Indicating Dial)\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eService\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003eWater, Steam, Other Liquids\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eSize\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003e1-1\/2\"\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eConnections\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003eThreaded, Union Ends, 125# FLG, 250# FLG (Optional)\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eSeat Material\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003eStainless Steel\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eBody Material\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\n\u003cdiv\u003e1\/2\" - 2\": Stainless Steel (Class IV)\u003c\/div\u003e\n\u003cdiv\u003e1\/2\" - 2\": Bronze (Reverse-Acting Class II)\u003c\/div\u003e\n\u003cdiv\u003e1\/2\" - 4\": Cast Iron\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003eMax Inlet Pressure\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003e250 PSIG\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"left\"\u003ePart Number\u003c\/div\u003e\n\u003cdiv class=\"right\"\u003e\u003cdiv\u003eW94-10-08S15-H16N\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv style=\"clear: both;\"\u003e \u003c\/div\u003e\u003ch2\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0721\/4576\/4430\/files\/Watson-McDaniel-W94-Series-Direct-Operated-Temperature-Regulators-Spec-Sheet.pdf?v=1786495713\"\u003eView Technical Specification Sheet Here\u003c\/a\u003e\u003c\/h2\u003e","brand":"Watson McDaniel","offers":[{"title":"Default Title","offer_id":44166195019854,"sku":"W94-10-08S15-H16N","price":3304.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/4576\/4430\/files\/Watson-McDaniel-W94-Series-Direct-Operated-Temperature-Regulators__36446.1784300409.1280.1280.jpg?v=1786668700","url":"https:\/\/valveman.com\/products\/1-1-2-watson-mcdaniel-w94-10-08s15-h16n-direct-operated-temperature-regulators-for-heating-with-steam-die-cast-aluminum-housing-200-280-f-heating-temperature-indicating-dial-3-1-2-npt","provider":"ValveMan","version":"1.0","type":"link"}