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3G Electric
SPENCE 99H Threaded Thermowell - Temperature Regulator & Duct Sensor Thermowells
SPENCETemperature Regulator & Duct Sensor Thermowells

SPENCE 99H Threaded Thermowell

The SPENCE Threaded Thermowell (MPN 99H) is a stainless steel temperature regulator and duct sensor thermowell designed for use with a 13 3/8 in stem length and 10 1/2 in insertion length. It has a maximum operating…

SKU 3G-OTH-179727

Brand
SPENCE
Item
99H Threaded Thermowell
Part Number
99H
Category
Temperature Regulator & Duct Sensor Thermowells
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

SPENCE
Manufacturer Part Number
99H
Type
For 13 3/8 in Stem Lg, 250 psi
Insertion Lg
10 1/2 in
Maximum Operating Pressure
250 psi
Maximum Operating Temperature
400°F

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SPENCE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SPENCE Threaded Thermowell (MPN 99H) is a stainless steel temperature regulator and duct sensor thermowell designed for use with a 13 3/8 in stem length and 10 1/2 in insertion length. It has a maximum operating pressure of 250 psi and a maximum operating temperature of 400°F.

Frequently Asked Questions

What is a SPENCE threaded thermowell used for?

A SPENCE threaded thermowell protects temperature sensors in industrial piping systems, allowing sensor replacement without system shutdown. It is used across process industries including HVAC, steam, and fluid handling where accurate temperature measurement is critical.

What are the specifications of the SPENCE 99H thermowell?

The SPENCE 99H thermowell is stainless steel, threaded, with a 13 3/8 in stem length and 10 1/2 in insertion length. It has a maximum operating pressure of 250 psi and a maximum operating temperature of 400°F. It is designed for temperature regulator and duct sensor applications.

Where to buy a SPENCE 99H thermowell worldwide?

3G Electric supplies the SPENCE 99H thermowell worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine SPENCE parts and deliver to your facility, ensuring compliance with international shipping requirements.

How to install a SPENCE threaded thermowell?

Install the SPENCE thermowell by threading it into a matching NPT port in the pipe or vessel. Apply anti-seize compound to threads, tighten to recommended torque, and insert the temperature sensor fully into the well. Ensure the stem length matches the sensor insertion depth for accurate readings.

Used in

Common applications for SPENCE
Process heating — SPENCE reverse-acting temperature regulators (e.g., 2020TD-GQD) control steam flow to maintain set temperatures in heat exchangers and jacketed vessels.
Condensate removal — SPENCE steam trap repair kit for model 4NU80 restores internal components in steam traps used for condensate removal and energy management.
Storage tank heating — SPENCE bronze temperature regulators with 1/2 in to 2 in connections modulate steam to maintain fluid temperatures in storage tanks.
HVAC and district heating — SPENCE reverse-acting regulators open on temperature drop to provide fail-safe heating in steam-based heating systems.
Industrial steam distribution — SPENCE temperature regulators and steam traps are used in steam headers and branch lines to control flow and remove condensate.
Maintenance and repair — SPENCE repair kits and replacement parts support planned maintenance programs for steam traps and regulators in continuous process plants.
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SPENCE Products

3G Electric supplies SPENCE temperature regulator & duct sensor thermowells. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Cast iron general purpose pressure regulator with 3/8 in FNPT x FNPTF connections. Rated for 40 psi to 110 psi and 33°F to 400°F. Used to reduce and stabilize downstream pressure in steam, air, or liquid systems for industrial heating, process control, and plant utility lines
SPENCE
Cast iron general purpose pressure regulator with 3/8 in FNPT x FNPTF connections. Rated for 40 psi to 110 psi and 33°F to 400°F. Used to reduce and stabilize downstream pressure in steam, air, or liquid systems for industrial heating, process control, and plant utility lines
Cast iron general purpose pressure regulator with 3/4 in FNPT x FNPTF connections. Reduces and maintains downstream pressure in steam, air, or liquid systems. Pressure range 2 psi to 20 psi; temperature range 33°F to 400°F
SPENCE
Cast iron general purpose pressure regulator with 3/4 in FNPT x FNPTF connections. Reduces and maintains downstream pressure in steam, air, or liquid systems. Pressure range 2 psi to 20 psi; temperature range 33°F to 400°F
Cast iron general purpose pressure regulator with 1 1/4 in FNPT x FNPTF connections. Reduces and maintains downstream pressure in steam, air, or liquid systems. Pressure range 45 to 100 psi; temperature range 33°F to 400°F. Suitable for industrial heating, process control, and plant utility lines
SPENCE
Cast iron general purpose pressure regulator with 1 1/4 in FNPT x FNPTF connections. Reduces and maintains downstream pressure in steam, air, or liquid systems. Pressure range 45 to 100 psi; temperature range 33°F to 400°F. Suitable for industrial heating, process control, and plant utility lines

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