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Steam Inlet Pressure Range (Low)
Low Pressure - PT Pilot (pressure under 15 PSIG) is used with HD-LP Low-PRessure main valve

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PT

PT Temperature Pilot

PT - Copper Bulb

Plain copper sensing bulb that is directly immersed into the fluid. Normally the PT bulb type is lowered down vertically into the top of a tank or vat to a desired vertical insertion depth.

ModelSensing BulbTemperature RangeCapillary LengthWeight (lbs)
PT-14-8Copper Bulb100 - 160°F8 Feet8
PT-29-8Copper Bulb120 - 180°F8 Feet8
PT-30-8Copper Bulb160 - 220°F8 Feet8
PT-31-8Copper Bulb200 - 260°F8 Feet8
PT-32-8Copper Bulb240 - 300°F8 Feet8
PT-12-8Copper Bulb60 - 120°F8 Feet8
PT-31-15Copper Bulb200 - 260°F15 Feet8
PT-12-15Copper Bulb60 - 120°F15 Feet8
PT-14-15Copper Bulb100 - 160°F15 Feet8
PT-30-15Copper Bulb160 - 220°F15 Feet8
PT-32-15Copper Bulb240 - 300°F15 Feet8
PT-29-15Copper Bulb120 - 180°F15 Feet8
Downloads
Catalog Spec Sheet (pdf)
I&M (pdf)
I&M (pdf) - Quick Install
Product Overview
PT Bulb Type is plain copper sensing bulb that is directly immersed into the fluid. Normally the PT bulb type is lowered down vertically into the top of a tank or vat to a desired vertical insertion depth.

The PT-Temperature Pilots are used with the HD regulator to control temperature in various processes and systems. Some examples are: oil heaters, ovens, process heaters, vats, dryers and jacketed kettles. Thermostatic sensing bulb comes with standard 8-ft. or 15-ft. capillary lengths. Temperature adjustment is accomplished by rotating an adjustment knob to the desired temperature setting.

The HD Regulator can be used with both the PP-Pressure Pilot and PT-Temperature Pilot simultaneously to limit pressure and control temperature in process applications.
Features
• Temperature adjustment made simple and easy by rotating an adjustment knob to the desired temperature setting
• Thermostatic sensing bulb comes with an 8-ft. or 15-ft. length capillary
• Capillary is armor-protected to resist damage
• Overheat protection bellows is incorporated into sensing bulb; 200°F overheat protection up to 350°F
• Full port strainer and blowdown valve on pilot adapter for protection of pilot from dirt and scale
How It Works
Controlling Temperature
PT-pilot is used for temperature control when steam is used on heating applications. The PT style pilot is a “solid liquid fill” design made up of a temperature probe connected by a length of capillary tubing to a bellows in the pilot valve. When the temperature bulb is heated the liquid inside the probe expands the bellows and closes off the pilot valve. The opening and closing of the pilot controls the flow of steam thru the main valve; which maintains system temperature. PT-pilot controls temperature through a range of 60-300°F. An overheat protection bellows is incorporated into sensing bulb.



Controlling Temperature & Limiting Pressure to a Maximum Value
The PT & PP Pilots combination is used when it’s required to control temperature while limiting downstream pressure to a maximum value. When the PT & PP Pilots combination is used, the downstream pressure is limited to a maximum setting by the pressure pilot, while the temperature pilot maintains the correct temperature of the process. This eliminates the need for a separate pressure reducing valve.

Selection / Sizing / Capacities
Example Model Code:
PTU-29-8 is Copper sensing bulb with Union connection, 120 - 180 °F with standard 8 ft capillary Length). If  it is changed to 20 ft of capillary. Model code becomes PTU-29-20.

Use Code LP:
Low pressure Temperature Pilot is required for steam pressure under 15 PSI. (Range 5 - 20)

Use Code SSBBAC:
The standard sensing bulb is copper. A 316 SS Bulb and bushing with 8 ft. armoured capillary is available for corrosive applications or to meet SWDA requirements. Use code SSBBAC.
Dimension and Weights