Pneumatic reset relief valve
First Claim
1. A pressure regulator valve assembly for connection to the output of a pressure varied supply source, the assembly comprising:
- (a) a valve body having an inlet port and a discharge port, wherein the supply source output is delivered through the inlet port;
(b) a pressure chamber between the inlet and outlet ports, the pressure chamber defining a cap;
(c) a load piston in the pressure chamber for modulating flow between the inlet and outlet ports;
(d) a rod coupled to the load piston and penetrating the cap;
(e) a pneumatic control chamber mounted to the cap;
(f) a top piston connected to the rod and positioned within the pneumatic control chamber; and
(g) a pneumatic control valve connected to the pneumatic control chamber, the pneumatic control valve adapted to set the pressure of the supply source at which valve assembly opens.
3 Assignments
0 Petitions
Accused Products
Abstract
A safety device protects a mud pump from an over pressure condition, which can occur during normal operation. The mud pump discharge couples to a high pressure inlet at the bottom of a valve body and the discharge outlet from the valve discharges to the side of the body, ninety degrees to the inlet. In a first aspect, the safety device includes a load piston mounted to a shaft which passes through a pressure chamber cap and connects to a pneumatic cylinder assembly on the top side of the pressure chamber cap. The pneumatic cylinder assembly is operated by a control valve mounted to the base of the cylinder to set the pressure at which the safety device actuates. In a further aspect, the safety device includes a light transmissive indicator cylinder, with a flag therein mounted on a rod coupling the valve to a pneumatic actuator piston, between the actuator piston and the valve.
18 Citations
8 Claims
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1. A pressure regulator valve assembly for connection to the output of a pressure varied supply source, the assembly comprising:
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(a) a valve body having an inlet port and a discharge port, wherein the supply source output is delivered through the inlet port;
(b) a pressure chamber between the inlet and outlet ports, the pressure chamber defining a cap;
(c) a load piston in the pressure chamber for modulating flow between the inlet and outlet ports;
(d) a rod coupled to the load piston and penetrating the cap;
(e) a pneumatic control chamber mounted to the cap;
(f) a top piston connected to the rod and positioned within the pneumatic control chamber; and
(g) a pneumatic control valve connected to the pneumatic control chamber, the pneumatic control valve adapted to set the pressure of the supply source at which valve assembly opens. - View Dependent Claims (2, 3, 4, 5)
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6. A pressure regulator valve assembly for connection to the output of a pressure varied supply source, the assembly comprising:
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(a) a valve body having an inlet port and a discharge port, wherein the supply source output is delivered through the inlet port;
(b) a pressure chamber between the inlet and outlet ports, the pressure chamber defining a cap;
(c) a load piston in the pressure chamber for modulating flow between the inlet and outlet ports;
(d) a rod coupled to the load piston and penetrating the cap;
(e) an valve position indicator mounted to the cap;
(f) a pneumatic control chamber mounted to the indicator;
(f) a control piston connected to the rod and positioned within the pneumatic control chamber; and
(g) a pneumatic control valve connected to the pneumatic control chamber, the pneumatic control valve adapted to set the pressure of the supply source at which valve assembly opens. - View Dependent Claims (7, 8)
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Specification