4" Watson McDaniel W94-09-08S15-C20F125 Self-Operating Temperature Regulators (For Cooling), Die-Cast Aluminum Housing, 155 - 250°F, Temperature Indicating Dial, 125# Flange
Custom quote, volume pricing, or Net 30 terms available.
Request a Formal Quote or call 888-825-8800Technical Specifications
General
| Model | W94 (Temperature Indicating Dial) |
|---|---|
| Service | Water, Steam, Other Liquids |
| Size | 4" |
| Part Number | W94-09-08S15-C20F125 |
| Brand | Watson McDaniel |
| Manufacturer Part # | W94-09-08S15-C20F125 |
| Country of Origin | Made in the United States |
Materials & Construction
| Seat Material | Stainless Steel |
|---|---|
| Body Material | 1/2" - 2": Stainless Steel (Class IV) |
Performance
| Max Inlet Pressure | 250 PSIG |
|---|
Connections
| Connections | Threaded, Union Ends, 125# FLG, 150# FLG, 250# FLG (Optional) |
|---|
Overview
Watson McDaniel W94-09-08S15-C20F125 Self-Operating Temperature Regulators For Cooling, 155 - 250°F Indicating (4" 125# Flange)
Features:
- Self-Operating (No External Power Source Required)
- Temperature Indicating & Non-Indicating models available.
- Heavy Duty Die-Cast Aluminum Housing
- 1/2" Thru 4" Valve Sizes
- Fully Enclosed Bellows
- Temperature Over-range protection spring to protect thermal system.
Options & Features (See Specification Sheet For Full List):
W94 Series For Cooling
The W91/W94 Self-Operating Temperature Regulator is a mechanically operated device designed to regulate system temperature by modulating the flow of a heating or cooling fluid in response to temperature changes; requires no external power source.
Reverse-Acting: Normally Closed Valves are used for COOLING, The actuators are designed to move the valve stem open (In-To-Open) as the control signal (Temperature) increases.
The W91 & 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.
- Model W91 Non-Indicating (Without Indicating Dial) features a lower profile and should be specified where space constraints may be an issue.
- Model W94 Temperature Indicating (With Indicating Dial) will allow the operator to verify the process temperature and to aid in temperature adjustment.
How It Works
The 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.
Normally Closed Valves are used for COOLING, so the valve stem opens (in-to-open) as the control signal (temperature) increases.
Double-Seated Balanced Valves are used for Cooling Applications where larger flow rates of water are frequently required, and a small leakage rate through the valve is normally acceptable. Leakage rate can be up to 0.5% of the maximum valve capacity (Class II shut-off).
Selection / Sizing / Capacities
Actuator Selection: The recommended working span for W91 & 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.
