Model 143
The Model 143 models are built to perform. They feature precise pressure control, as well as outstanding performance and dependability. These gas regulators are also available with a low-pressure cut-off.
The Model 143 regulators are used for both residential and small commercial and industrial applications, such as burners, furnaces, ovens, heaters, gas engines and others.
They are available with a variety of body sizes, loading springs and orifice sizes. These compact regulators also provide the outlet pressure ranges and the capacities to fit most applications for a 6″ service diaphragm regulator.
Benefits & Features
The Model 143 offers smart features, including an internal relief valve and a union nut connection, which does not require bolts or screws to connect the body to the diaphragm assembly. This enables the regulators to be set in virtually any position for excellent field versatility. They are simple, rugged and precise regulators that deliver the results you desire.
01.
Installs in numerous mounting positions
02.
Delivers precise pressure control
03.
Low-pressure cut-off available
04.
Internal relief valve available
05.
Seven outlet pressure ranges
Technical Data
| Valve Body | Cast Iron – 125 psig working pressure |
| Spring and Lower Case | Die-Cast Aluminum |
| Orifice | Aluminum |
| Fulcrum Pin | Stainless Steel |
| Valve Seat | One piece molded Buna-N |
| Valve Stem | Fiberglass reinforced nylon |
| Throat/Support/Stem | Acetal insert |
| Diaphragm Plate | Plated Steel |
| Diaphragm | Nylon fabric-reinforced Buna-N with full 26in² effective area |
| Vent and Valve | Polyethylene valve and seat, 1″ NPT vent |
| Operating Temperature | -20° to +150° F (-28.9° to +65.5° C) |
| Corrosion Protection | Cases dip primed chromate conversion coating, enamel topcoat |
| Internal Relief Valve | Set to relieve at approximately 7-10″ w.c. above normal outlet pressure setting |