W94. Specifications. Protection: Models Temperature Range Capillary Length Sensing Bulb Valve Body Selection

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1 Temperature Model W91 (No Indicating Dial) W94 (Temperature Indicating Dial) Service Water, Steam, Other Liquids Sizes 1/2 4 onnections Threaded, Union Ends, 125# FLG 250# FLG (optional) ody Material 1/2 1 1 /2 ronze/stainless Steel 2 ast Iron (Direct-acting) 2 ronze (Reverse-acting) 2 1 /2 4 ast Iron Seat Material Stainless Steel Max Inlet Pressure 250 PSIG W94 For Heating & ooling W91 (no Indicating Dial) Typical pplications The W91 & W94 Self-Operating Temperature 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 ctuator is noted for its rugged die-cast aluminum housing, fully-enclosed bellows assembly and internal over-temperature range protection. Model W91 Non-Indicating (without indicating dial) features a lower profile and should be specified where space constraints may be an issue. Specifications Dial Thermometer: Housing: ellows: Temperature Over-range Protection: 3 1 /2" dial, stainless steel case, swivel and angle adjustment (Model W94 only) Die-cast aluminum, epoxy powder coated grey finish High-pressure brass, corrosion resistant, tin plated finish Protects Thermal System from damage up to 100 F over high limit of range Model W94 Temperature Indicating (with indicating dial) will allow the operator to verify the process temperature and to aid in temperature adjustment. Features Self-Operating (no external power source required) Temperature Indicating & Non-Indicating models available Heavy Duty Die-ast luminum Housing 1/2" thru 4" Valve Sizes Fully Enclosed ellows Temperature Over-range protection spring to protect thermal system Model ode onfiguration Temperature Regulator Valve ction pplication Stem ction Normal (Fail) Position Heating In-To-lose Normally Open ooling In-To-Open Normally losed How to write proper model number: Explanation of W S15 H13N Model Number: Model Temp. ap. ulb Valve Range Length Type ody Model Number: W S15-H13N Models Temperature Range apillary Length Sensing ulb Valve ody Selection W91 Non-Indicating Refer to 08 8 Feet (standard) S15 rass bulb Refer to Valve ody Section W94 Indicating Dial Temperature Feet (standard) Range hart Feet (Omit this selection Feet S16 Stainless bulb if purchasing ctuator only) Feet Note: Thermowells are ordered separately. See Thermowell & ulb onnections page Pottstown P US Tel:

2 Temperature Temperature Range Selection For Heating & ooling W91 Non-Indicating ctuator W94 Temperature Indicating ctuator Ø 3.63 [92] 4.92 [125] Ø 3.67 [93] 9.00 [228] 9.00 [228] Dimensions: inches [mm] ctuator Weight: 6 lbs. Description of Working Span The recommended working span typically falls within the upper third of the nominal range. Single-Seat In-To-lose, 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. Temperature Range hart W91 & W94 ctuators Range Nominal Recommended ode Range Working Span * to 70 F -10 to to 65 F 5 to to 90 F 5 to to 85 F 20 to to 115 F 0 to to 110 F 30 to to 140 F 10 to to 135 F 45 to to 165 F 25 to to 160 F 60 to to 195 F 40 to to 190 F 70 to to 215 F 55 to to 210 F 90 to to 250 F 70 to to 245 F 100 to to 280 F 95 to to 275 F 120 to to 315 F 110 to to 310 F 135 to to 370 F 125 to to 365 F 155 to to 420 F 145 to to 415 F 185 to to 440 F 155 to to 435 F 215 to 225 *Note: The recommended working span typically falls within the upper third of the nominal range. Tel: Pottstown P US 273

3 Temperature ulb & Thermowell Selection Temperature For Heating & ooling SENSING UL & PILLRY Selection Sensing ulb Selection & Installation: The sensing bulb and capillary are available in opper (best heat transfer properties) or Stainless Steel (for corrosive applications). opper 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. Thermowell Option (ordered separately) thermowell isolates the sensing bulb from the process fluid. It can be used to remove the sensing bulb while the system is filled with fluid or to protect the sensing bulb from corrosive liquids or excessive system pressures (see following page). Sensing ulb & apillary ORDER Sensing ulb apillary Tubing apillary Length in Ft. ODE Material Material 8, 12, S15 S16 opper opper (rass Union Hub) with Stainless Steel Spiral rmour U Stainless Steel Stainless Steel (Stainless Steel Union Hub) with Stainless Steel Spiral rmour U Other Options available. onsult Factory. Tank Wall UNION NUT Unscrews for Sensing ulb Removal STINLESS STEEL RMOUR PROTETED PILLRY Insertion Length U Sensing ulb Length Sensing ulb 1.00 UNION HU - 1 NPT The union hub is threaded into side of vessel & is not permanently fastened to bulb. (union hub is included with sensing bulb & not need e d when using a Thermowell) ulb being removed from thermowell Sensing ulb Pottstown P US Tel:

4 Temperature ulb & Thermowell Selection For Heating & ooling SENSING UL inside OPTIONL THERMOWELL Thermowell Option (ordered separately) Thermowells isolate and protect the sensing bulb from the process fluid, and are available in either rass (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 opper 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. Thermowell Length must be selected based on the length of the sensing bulb. The sensing bulb length is based on the length of the apillary 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 ulb hart for sensing bulb length. THERMOWELLS - Model Numbers & Lengths rass Stainless Steel Nominal INSERTION LENGTH (in.) apillary Length Model ode Model ode Length UL THERMOWELL (Ft.) 536-S2 536-S6 13" , 12 or SE2 536-SE6 16" WE2 536-WE6 20" Notes: 1) Other connections and lengths may be available, consult factory. 2) External pressure rating on opper is 500 PSI max. 3) External pressure rating on 316 SS is 1000 PSI max. The Thermowell isolates the sensing bulb from the process liquid and allows for easy and safe removal of the sensing bulb. For applications in which the process media may be corrosive or contained under pressure, the use of a thermowell is required to prevent damage to the sensing bulb. For corrosive applications, use a stainless steel thermowell & copper sensing bulb. To ensure minimum response time, Heat Transfer Paste should be applied to the sensing bulb prior to installation into the thermowell. UNION NUT Unscrews for Sensing ulb Removal Tank Wall THERMOWELL LENGTH Insertion Length Thermowell Sensing ulb 1.13 HU /4 NPT (ttached to thermowell and threaded into side of vessel) ulb being removed from thermow ell Sensing ulb THERMOWELL LENGTH Insertion Length Sensi ng Thermowell remains in place during installation or removal of bulb HU /4 NPT (ttached to thermowell and threaded into side of vessel) Tank Wall Tel: Pottstown P US 275

5 Temperature Model odes in hart are for complete Temperature. This includes the Valve ody and Thermal ctuator with standard copper bulb and 8 ft. capillary. W91 HETING Non-Indicating Type ctuator Indicating Type ctuator with valve body with valve body X = Temperature Range X = Temperature Range 08 = apillary Length 8ft. PMO 08 = apillary Length 8ft. PMO Weight onnection S15 = opper ulb (PSI) S15 = opper ulb (PSI) (lbs) 1/2 NPT Standard ody W91-X-08S15-H12N 250 W94-X-08S15-H12N with Integral Union W91-X-08S15-H12U 250 W94-X-08S15-H12U /4 NPT Standard ody W91-X-08S15-H13N 250 W94-X-08S15-H13N with Integral Union W91-X-08S15-H13U 250 W94-X-08S15-H13U NPT Standard ody W91-X-08S15-H14N 200 W94-X-08S15-H14N with Integral Union W91-X-08S15-H14U 200 W94-X-08S15-H14U /4 NPT Standard ody W91-X-08S15-H15N 200 W94-X-08S15-H15N with Integral Union W91-X-08S15-H15U 200 W94-X-08S15-H15U /2 NPT Standard ody W91-X-08S15-H16N 200 W94-X-08S15-H16N with Integral Union W91-X-08S15-H16U 200 W94-X-08S15-H16U NPT Standard ody W91-X-08S15-H17N 150 W94-X-08S15-H17N W91-X-08S15-H17F W94-X-08S15-H17F *Flanged 2 1 /2 with W91-X-08S15-H18F W94-X-08S15-H18F Standard ctuator W91-X-08S15-H19F W94-X-08S15-H19F W91-X-08S15-H20F W94-X-08S15-H20F /2 *Flanged W91H-X-08S15-H18F N/ with High-Force W91H-X-08S15-H19F N/ ctuator W91H-X-08S15-H20F N/ - 60 * 250# Flange available. onsult Factory. The Special High-Force ctuator will allow the valve to be operated at a higher operating pressure. Model onfiguration hart Note: Thermowells for Models W91/W94 are ordered separately. Models Temperature Range = X apillary Length Sensing ulb Valve ody Selection W91 Non-Indicating Feet (std) S15 opper ulb (std) Included in Model ode W94 Indicating Dial (Refer to Temperature Feet (with rass Union Hub) in above chart. W91H High-Force Range hart) Feet Feet S16 Stainless Steel ulb Feet (with SS Union Hub) W94 W91 05 ( F) 12 S15 H15N (1 1 /4 NPT) 276 Range ode Nominal Temperature Range * F F F F F F F F F F F F F * The recommended working span falls within the upper third of the nominal range. Example Model ode configured: W S15-H15N (W91, F Temp. Range, 12 ft. capillary, Std. opper Sensing ulb, 1 1 /4 NPT Valve ody) Valve bodies used for HETING have designation H (Example: H15N) Normally Open (IN-TO-LOSE) Single-seated alanced Valve with lass IV shut-off Pottstown P US Tel: HETING

6 Single-Seated Valve odies for Temperature NORMLLY OPEN Stem In-To-lose for HETING Single Seat 1/2 4 Dimensions in inches HETING ctuator Mounting Surface ctuator Mounting Surface Union (NPT) (UNION) THREDED & UNION FLNGED Valve ody Specifications ody Material Trim Material onnection Pressure & Temperature Rating 1/2-1 1 /2 Stainless/ronze Stainless Steel Threaded or Malleable Iron Union Ends F 2 ast Iron Stainless Steel Threaded F 2-4 ast Iron Stainless Steel 125# Flanged F 250# Flanged F Valve ody Selection Valve ody Number Size Maximum Dimensions pprox. (In-To-lose Heating) onnection apacity lose-off Pressure Ship. Wt. NPT Union NPT v (PSI P) Threaded 125# FLG 250# FLG Union (lbs) [kg] H12N H12U 1/2" x x [6.35] H13N H13U 3/4" x x [6.35] H14N H14U 1" x x [6.35] H15N H15U 1 1 /4" x x [7.7] H16N H16U 1 1 /2" x x [8.2] H17N 2" x x x [22.7] FLNGED Valve Type 125# 250# Standard Special* H17F125 H17F250 2" x x [36.3] H18F125 H18F /2" x x [43.6] H19F125 H19F250 3" x x [49.9] H20F125 H20F250 4" x x [72.6] Notes: For 2 1 /2-4 sizes, consult factory for proper actuators. * With High-Force ctuator, which allows the valve to operate at a higher differential pressure. Tel: Pottstown P US 277

7 apacity harts Single-Seated Valve odies for Temperature HETING PITIES Steam (lbs/hr) Inlet Pressure (PSIG) SINGLE-SETED VLVES Size & Valve ody Number 1/2" 3/4" 1" 1 1 /4" 1 1 /2" 2" 2 1 /2" 3" 4" H12 H13 H14 H15 H16 H17 H18 H19 H , , , ,513 16, ,755 18, ,996 20, ,237 22, ,077 17,340 27, ,238 20,443 32, Notes: 1) For reduced-port 1/2 valves, consult factory. 2) ll steam capacities based on ritical Drop (hoked Flow). Note: Verify that Maximum lose-off Pressure for 2-4 models does not exceed max rating for selected Valve ody Number and Type (refer to Valve ody Number in chart). Note: When used with water, add W to the Valve ody Number. Example: H17N becomes HW17N Note: Verify that Maximum lose-off Pressure for 2-4 models does not exceed max rating for selected Valve ody Number and Type (refer to Valve ody Number chart on previous page) PITIES Water (GPM) Pressure (PSI P) SINGLE-SETED VLVES Size & Valve ody Number 1/2 3/ /4 1 1 / /2 3 4 HW12 HW13 HW14 HW15 HW16 HW17 HW18 HW19 HW Pottstown P US Tel:

8 apacity harts Single-Seated Valve odies for Temperature Steam flow required through a temperature regulator (lbs/hr) to heat a specified number of gallons of water per hour (gal/hr) HETING Steam Required for Heating Water TLE 1- Steam Flow Required in Pounds Per Hour (lbs/hr) Temp ` Temp Increase Gallons of Water per Hour To e Heated Increase ( F) ,000 20,000 ( F) , , , , , ,790 21, ,030 24, ,280 26, ,524 29, ,600 33, ,680 37, ,750 41, HETING WTER: The amount of steam required to heat water can be found using chart above. Example: To heat 1000 gallons per hour of water from 40 F to 140 F (Temp. increase 100 F) requires 830 lbs/hr of steam. HETING FUEL OIL: The amount of steam required to heat fuel oil is half of that to heat water. Use half the value found in chart above. Example: To heat 1000 gallons per hour of fuel oil from 40 F to 140 F (Temp. increase 100 F) requires 415 lbs/hr of steam. apacity Formulas for Steam Loads When Heat Load or Heat Transfer apacity of E (tu/hr) Rate (E) is Known steam required = 1000 (lbs/hr) When Square Feet Equivalent apacity of Direct Radiation (EDR) is Known steam required = Sq. ft. of EDR (lbs/hr) 4 When Heating Water with Steam apacity of steam required = GPM x Temp Rise ( F) (lbs/hr) 2 When Heating Fuel Oil with Steam apacity of steam required = GPM x Temp Rise ( F) (lbs/hr) 4 When Heating ir with Steam oils apacity of steam required = FM x Temp Rise ( F) (lbs/hr) 900 Note: bove formulas based on steam co ntaining approximate ly 1000 tu s of Latent Heat per pound. Tel: Pottstown P US 279

9 Temperature OOLING Model odes in hart are for complete Temperature. This includes the Valve ody and Thermal ctuator with standard copper bulb and 8 ft. capillary. W91 W94 Non-Indicating Type ctuator Indicating Type ctuator with valve body with valve body X = Temperature Range X = Temperature Range 08 = apillary Length 8 ft. PMO 08 = apillary Length 8 ft. PMO onnection S15 = opper ulb (PSI) S15 = opper ulb (PSI) Weight 3/4 NPT with Integral Union W91-X-08S15-13U 250 W94-X-08S15-13U NPT with Integral Union W91-X-08S15-14U 250 W94-X-08S15-14U /4 NPT with Integral Union W91-X-08S15-15U 250 W94-X-08S15-15U /2 NPT with Integral Union W91-X-08S15-16U 250 W94-X-08S15-16U NPT with Integral Union W91-X-08S15-17U 250 W94-X-08S15-17U /2 125# FLG W91-X-08S15-18F W94-X-08S15-18F # FLG W91-X-08S15-19F W94-X-08S15-19F # FLG W91-X-08S15-20F W94-X-08S15-20F Model onfiguration hart Models Temperature Range = X apillary Length Sensing ulb Valve ody Selection W91 Non-Indicating Feet (std) S15 opper ulb (std) Included in Model ode W94 Indicating Dial (Refer to Temperature Feet (with rass Union Hub) in above chart. Range hart) Feet Feet S16 Stainless Steel ulb Feet (with SS Union Hub) W91 05 ( F) 12 S15 15U (1 1 /4 NPT) Example Model ode configured: W S15-15U (W91, F Temp. Range, 12 ft. apillary, opper Sensing ulb, 1 1 /4 NPT Valve ody) Range ode Nominal Temperature Range * F F F F F F F F F F F F F * The recommended working span typically falls within the upper third of the nominal range. Valve bodies used for OOLING have designation (Example: 15U) Normally losed (IN-TO-OPEN) Double-seated alanced Valve with lass II shut-off Note: Thermowells for Models W91/W94 are ordered separately. OOLING 3/4-2 NPT with Integral Union for Easy Removal from the piping system Pottstown P US Tel:

10 Double-Seated Valve odies for Temperature NORMLLY LOSED Stem In-To-Open for ooling Double Seat 3/4 4 Dimensions in inches [mm] OOLING ctuator Mounting Surface ctuator Mounting Surface 3/4 2 NPT 2 1 /2 4 Flanged Valve ody Specifications ody Material Trim Material onnection Pressure & Temperature Rating 3/4-2 ronze Stainless Steel Threaded with Malleable Iron Union Ends F (210 ) 21/ 2-4 ast Iron Stainless Steel 125# Flanged F (149 ) Valve ody Selection Threaded Valve ody Number Size Maximum pproximate apacity lose-off Pressure Dimensions Shipping Wt. (In-To-Open ooling) onnection (NPT) Nominal Port v (PSI P) (lbs) [kg] 13U 3/4 3/4" [142] 2.3 [58] 2.3 [58] 5.0 lbs [2.25 kg] 14U 1 1" [152] 2.3 [58] 2.3 [58] 6.1 lbs [2.75 kg] 15U 1 1 /4 1 1 /4" [183] 2.6 [66] 2.6 [66] 10.1 lbs [4.55 kg] 16U 1 1 /2 1 1 /2" [196] 2.6 [66] 2.6 [66] 11.1 lbs [5.00 kg] 17U 2 2" [218] 3.1 [79] 3.1 [79] 17.0 lbs [7.65 kg] Valve ody Selection Flanged Valve ody Number Size Maximum pproximate apacity lose-off Pressure Dimensions Shipping Wt. (In-To-Open ooling) onnection Nominal Port v (PSI P) (lbs) [kg] 18F /2" 2 1 /2" [198] 4.8 [122] 5.4 [137] 45 lbs [20 kg] 19F125 3" 3" [229] 5.0 [127] 5.6 [142] 70 lbs [32 kg] 20F125 4" 4" [290] 6.3 [160] 6.5 [165] 100 lbs [45 kg] Tel: Pottstown P US 281

11 Temperature MIXING & DIVERTING Model odes in hart are for complete Temperature. This includes the Valve ody and Thermal ctuator with standard copper bulb and 8 ft. capillary. W91 W94 Non-Indicating Type ctuator Indicating Type ctuator with valve body with valve body X = Temperature Range X = Temperature Range 08 = apillary Length 8 ft. PMO 08 = apillary Length 8 ft. PMO Weight onnection S15 = opper ulb (PSI) S15 = opper ulb (PSI) 1/2 NPT with Integral Union W91-X-08-S W94-X-08-S /4 NPT with Integral Union W91-X-08-S W94-X-08-S NPT with Integral Union W91-X-08-S W94-X-08-S /4 NPT with Integral Union W91-X-08-S W94-X-08-S /2 NPT with Integral Union W91-X-08-S W94-X-08-S NPT with Integral Union W91-X-08-S W94-X-08-S /2 125# FLG W91-X-08-S W94-X-08-S # FLG W91-X-08-S W94-X-08-S # FLG W91-X-08-S W94-X-08-S Model onfiguration hart Note: Thermowells for Models W91/W94 are ordered separately. Models Temperature Range = X apillary Length ulb Valve ody Selection W91 Non-Indicating Feet (standard) S15 opper ulb Included in Model ode W94 Indicating Dial (Refer to Temperature Feet (with rass Union Hub) in above chart. Range hart Feet on next page) Feet S16 Stainless Steel ulb Feet (with SS Union Hub) W91 05 ( F) 12 S15 45 (1 1 /4 NPT) Example Model ode configured: W S15-45 (W91, F Temp. Range, 12 ft. apillary, opper Sensing ulb, 1 1 /4 NPT Valve ody) Range ode Nominal Temperature Range * F F F F F F F F F F F F F * The recommended working span typically falls within the upper third of the nominal range. Mixing Flow Diagram ir 50% Valve ody for MIXING & DIVERTING UPPER PORT OMMON PORT LOWER PORT Diverting Flow Diagram ir 50% UTION: 3-Way Valves are not designed for use in steam applications. To properly control the mixing of two flows, inlet pressures at ports and should be as equal as possible Pottstown P US Tel:

12 3-Way Valve odies for Temperature 3-Way 1/2 4 for Mixing or Diverting Dimensions in inches [mm] ctuator Mounting Surface ctuator Mounting Surface G G upper port PORT UPPER () lower port PORT LOWER () upper port lower LOWER port PORT () G F F common port E 1/2 2 NPT OMMON PORT () E OMMON common PORT port () E 2 1 /2 4 Flanged F UTION: Watson McDaniel 3-Way Valves are not designed for use in steam applications. To properly control the mixing of two flows, inlet pressures at ports and should be as equal as possible. Valve ody Specifications ody Material Trim Material onnection Pressure & Temperature Rating 1/2-2 ronze ronze Threaded with Malleable Iron Union Ends F (149 ) 2 1 /2-4 ast Iron ronze 125# Flanged F (149 ) Valve ody Selection Size Maximum Valve ody Number apacity lose-off Pressure Dimensions pproximate onnection (NPT) Nominal Port v (PSI P) E F G Shipping Wt. 18 1/2" 1/2" [122] 1.8 [46] 1.8 [46] 2.9 lbs [1.31 kg] 25 3/4" 3/4" [142] 2.3 [58] 2.3 [58] 4.7 lbs [2.12 kg] 34 1" 1" [152] 2.3 [58] 2.3 [58] 5.7 lbs [2.57 kg] /4" 1 1 /4" [183] 2.8 [71] 2.6 [66] 9.5 lbs [4.28 kg] /2" 1 1 /2" [196] 3.5 [89] 2.6 [66] 11.1 lbs [5.00 kg] 67 2" 2" [218] 4.1 [104] 3.1 [79] 16.7 lbs [7.55 kg] Valve ody Selection Size Maximum Valve ody Number apacity lose-off Pressure Dimensions pproximate onnection Nominal Port v (PSI P) E F G Shipping Wt /2" 2 1 /2" [229] 7.1 [180] 5.2 [132] 62 lbs [28 kg] 80 3" 3" [254] 8.0 [203] 6.0 [152] 80 lbs [36 kg] 85 4" 4" [330] 10.0 [254] 6.9 [175] 140 lbs [64 kg] Tel: Pottstown P US 283

13 for Temperature apacity harts OOLING PITIES Water (GPM) Pressure Drop Double-Seated Valve odies Size, Valve ody Number & oefficient (v) DOULE-SETED VLVES 3/ /4 1 1 / /2 3 4 (PSI P) 13U 14U 15U 16U 17U 18F125 19F125 20F125 v = 8 v = 12 v = 21 v = 30 v = 47 v = 69 v = 90 v = Note: Double-seated valves have In-to-Open (ITO) stem action for cooling applications. MIXING & DIVERTING PITIES Water (GPM) 3-Way Valve odies 3-WY VLVES Size, Valve ody Number & oefficient (v) Pressure 1/2 3/ /4 1 1 / /2 3 4 Drop (PSI P) v = 2.8 v = 5.6 v = 8.4 v = 15 v = 21 v = 33 v = 58 v = 72 v = Note: Oil service or high temperature service requires special O-ring Pottstown P US Tel:

14 for Temperature Replacement ctuators W91 Non-indicating Replacement ctuator W94 Indicating Replacement ctuator Replacement ctuator Model onfiguration Note: Thermowells for Models W91/W94 are ordered separately. Example Model ode configured: W S15 Models Temperature Range = X apillary Length ulb W Feet (std) S15 opper ulb W94 (Refer to Temperature Feet (with rass Union Hub) Range hart) Feet Feet S16 Stainless Steel ulb Feet (with SS Union Hub) W91 05 ( F) 12 S15 Thermowells for W91 & W94 Series Self-Operated Temperature apillary ulb Length Thermowell onnection rass Stainless Steel Length (ft.) Required Length (in.) Size NPT Model # Model # 8, 12 or /4 536S2 536S /4 536SE2 536SE /4 536WE2 536WE6 Note: Thermowell Length chosen is based on the Length of the apillary used in the Thermal System. (See chart above) Tel: Pottstown P US 285