Trerice

H.O. Trerice Co. of Oak Park, Michigan, has made temperature and pressure instruments and controls since H.O. Trerice founded it in 1923. Its pressure gauges read the pressure in a boiler or steam line, and its self-operating temperature regulators open or close a valve as the temperature at a sensing bulb changes.

On the gauge side, BoilerSupplies.com lists the Trerice No. 450, 500X, 600, 700, 800 and 800LF Series; on the regulator side, the Trerice 91000 Series. A gauge is ordered by dial size, range, connection size and whether the connection comes out the bottom or the back. Case and wetted material follow the service it reads: steam, water, air or oil. A replacement is matched to the old gauge on those points. The 91000 Series regulator is a self-operating, non-indicating unit: it shows no temperature reading of its own. It is ordered by temperature range, bulb and capillary, valve size and the medium it controls, steam or water.

Key facts

• H.O. Trerice Co. was founded in 1923 and is based in Oak Park, Michigan.

• Trerice makes temperature and pressure instruments and controls, including pressure gauges and temperature regulators.

• BoilerSupplies.com lists Trerice pressure gauges in the No. 450, 500X, 600, 700, 800 and 800LF Series.

• The Trerice 91000 Series is a self-operating, non-indicating temperature regulator that needs no outside power.

• A pressure gauge is replaced by matching dial size, range, connection size and connection position to the old gauge.

• In-stock small-pack orders placed before 2:00 PM EST, Monday through Friday, ship the same day.

Boiler gauge, steam gauge, pressure gauge: does Trerice make all three?

Yes, and they are one part. Boiler gauge and steam gauge are names a pressure gauge picks up from where it is mounted, and the Trerice series on BoilerSupplies.com are pressure gauges. A steam gauge on a boiler front and a pressure gauge on a feed line are picked the same way: series, dial size, range and connection.

What do you need from me to get the right Trerice gauge?

Read the old gauge: dial size, the range printed on the dial, the connection size, and whether the connection leaves the case at the bottom or the back. Add what it reads: steam, water, air or oil. A photo of the dial and the back of the case covers most of it. Send those with the request.

How does a Trerice 91000 Series temperature regulator work without power?

A Trerice 91000 Series regulator is self-operating: the sensing bulb sits in the water or product being heated, and as its temperature changes, the bulb moves the valve through the capillary. No air supply, no electricity, no controller. Set it to the temperature the coil or tank should hold, and the valve throttles the steam or water feeding it to hold that point.

Can I replace a Trerice gauge with a different series if the dial and range match?

Only when the connection size and position also match and the case and wetted material suit the service; the same series is the safe swap. Dial size and range are the two things everyone checks; the connection coming out the back instead of the bottom is the one that sends a gauge back. Send the old series number with the request.

What do you need from me to order a Trerice 91000 Series temperature regulator?

A Trerice 91000 Series regulator is ordered by temperature range, bulb and capillary, valve size and the medium it controls, steam or water. Read those off the tag on the old regulator, and add what it feeds, a coil, a tank or a heat exchanger, and the count. A picture of the regulator tag and the bulb covers the rest.

For a Trerice gauge or regulator, have the series number, the size and the range ready. Call 1-770-957-9599, toll free 1-800-780-3776, with those three, or type them into the request on BoilerSupplies.com.