US 2025/0060123 A1 · High and Low Temperature Shutdown Pneumatic Thermostat And Method

Abstract

A pneumatic thermostat and method, particularly suitable for oil and gas burner systems, which incorporates a dual seat valve with valve seats on each end, and a pair appropriately sized plugs, attached via a rod which is placed through the dual seat valve. This assembly is preferably coupled to a thermal expansion sleeve and internal rod, which move the assembly back and forth. With these mechanics and peripheral features, which can include for example high and low temperature venting and a bypass system, embodiments of the present invention can maintain a target temperature and shut-down pressure in the event that a temperature drops below an operating range.

Claims20

Dependent claims

A pneumatic thermostat comprising:

a valve assembly comprising:
a dual seat valve;
a first valve seat disposed or formed onto on a first end of said dual seat valve;
a second valve seat disposed or formed onto a second end of said dual seat valve;
a passageway connecting said first valve seat and said second valve seat;
a connecting member disposed within said passageway, said connecting member rigidly connecting a first plug to a second plug and configured to translate within said passageway;
and
said first plug configured to seat against said first valve seat and said second plug configured to seat against said second valve seat.

5 more elements

Dependencies are inferred from the claim text.

High and Low Temperature Shutdown Pneumatic Thermostat And Method

Life of this patent

High and Low Temperature Shutdown Pneumatic Thermostat And Method

Life of this patent

Abstract

Claims20