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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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PTBW

PTBW Temperature Pilot

PTBW - Copper Bulb w/ Extended Thermowell

For deeper & variable insertion depths into tanks or vats; up to 18” deep. The extended length Brass Well Isolation Well isolates the copper sensing bulb from the liquid and allows the copper sensing bulb insertion depth to be adjusted to a depth of up to 18”. Isolation Well remains in place which allows the removal of the sensing bulb without having to drain the tank.

ModelSensing BulbTemperature RangeCapillary LengthWeight (lbs)
PTBW-14-8Copper Bulb w/ Extended Thermowell100 - 160°F8 Feet8
PTBW-29-8Copper Bulb w/ Extended Thermowell120 - 180°F8 Feet8
PTBW-12-8Copper Bulb w/ Extended Thermowell60 - 120°F8 Feet8
PTBW-31-8Copper Bulb w/ Extended Thermowell200 - 260°F8 Feet8
PTBW-32-8Copper Bulb w/ Extended Thermowell240 - 300°F8 Feet8
PTBW-30-8Copper Bulb w/ Extended Thermowell160 - 220°F8 Feet8
PTBW-12-15Copper Bulb w/ Extended Thermowell60 - 120°F15 Feet8
PTBW-29-15Copper Bulb w/ Extended Thermowell120 - 180°F15 Feet8
PTBW-14-15Copper Bulb w/ Extended Thermowell100 - 160°F15 Feet8
PTBW-31-15Copper Bulb w/ Extended Thermowell200 - 260°F15 Feet8
PTBW-32-15Copper Bulb w/ Extended Thermowell240 - 300°F15 Feet8
PTBW-30-15Copper Bulb w/ Extended Thermowell160 - 220°F15 Feet8
Downloads
Catalog Spec Sheet (pdf)
I&M (pdf)
I&M (pdf) - Quick Install
Product Overview
PTBW & PTSW Bulb Type is PT style copper sensing bulb with Extended Length Thermowell. For deeper & variable insertion depths into tanks or vats; up to 18” deep. The extended length Isolation Well isolates the copper sensing bulb from the liquid and allows the copper sensing bulb insertion depth to be adjusted to a depth of up to 18”. They are available in either Brass or 316L Stainless Steel. Isolation Well remains in place which allows the removal of the sensing bulb without having to drain the tank.

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