A proportioning valve for a reverse osmosis system that controls the production of product water by the differential pressure across the purification membrane. By sensing increasing tank pressure to actuate the proportioning valve, the flow of waste water is restricted. Placement of seals within the cavity of the valve, as well as placement of waste water inlet and outlet ports, protects tension components that provide reverse tank pressure from waste water exposure. A needle valve assembly responsive to an actuating assembly that senses tank pressure removes the need for an inlet tank water port while restricting water flow.

A proportioning valve for a reverse osmosis system that controls the production of product water by the differential pressure across the purification membrane. By sensing increasing tank pressure to actuate the proportioning valve, the flow of waste water is restricted. Placement of seals within the cavity of the valve, as well as placement of waste water inlet and outlet ports, protects tension components that provide reverse tank pressure from waste water exposure. A needle valve assembly responsive to an actuating assembly that senses tank pressure removes the need for an inlet tank water port while restricting water flow.

For determining the operability of a fluid driven safety valve, a method comprising the following steps is described: A partial stroke test is performed on the safety valve, resulting in a stroke-pressure curve. The stroke pressure curve is extrapolated (330, 340) beyond the measured range (360) up to the safety closing position (350). From the extrapolated stroke-pressure curve, the closing pressure reserve (320) can be determined. In this way, the functionality of the safety valve can be checked during operation.

A safety release bleeder valve serving as a plug includes a barrel having an exterior surface and an interior throughbore surface for matingly receiving a plug having a top end with exterior threads and an interior socket for receiving a driver tool for moving the plug between an open venting state and a closed non-venting state.

A flow rate adjusting device of the present invention includes a flow channel member and a valve mechanism. The valve mechanism includes a rod, a knob and a lock mechanism. The lock mechanism is switched by the knob moving in the traverse direction between a prohibited state in which the engaging portion is engaged with the to-be-engaged portion so that the rotation of the rod relative to the flow channel member is prohibited via the knob and a permitted state in which the engagement between the engaging portion and the to-be-engaged portion is undone so that the rod is permitted to rotate relative to the flow channel member.

A bellows seal valve includes a pressurization port that can be used to apply a compensating pressure to the “atmosphere” side of the bellows, i.e. the side of the bellows that is opposite to the process fluid. The atmosphere side can be on the interior or exterior of the bellows. The compensating pressure can be greater than the process fluid pressure, to ensure that any leakage will be of pressurizing fluid into the process fluid or into the environment, and that no process fluid will escape into the environment. The pressure or flow rate of the pressurizing fluid can be monitored to detect bellows and packing leaks. A pressurizing fluid exit port can be provided, so that the pressurizing fluid can be circulated through the valve, thereby moderating the bellows temperature under conditions of extreme process fluid temperature.

A valve system, for use with a cylinder having an extensible rod, includes a first valve assembly having a first inlet/outlet port, a check valve biased toward a closed state, the check valve having a check valve body at least partially receivable within a first port of the cylinder, a flow control valve positioned in series between the first inlet/outlet port and the check valve, and a first pilot port selectively communicable with a source of pressurized gas for opening the check valve. The valve system further includes a second valve assembly having a second inlet/outlet port, a second pilot port through which the pressurized gas must flow before being introduced to the first pilot port, and a valve body at least partially receivable within a second port of the cylinder.

A cryogenic cylinder control system for regulating fluid within a cryogenic cylinder is disclosed. The system includes a pressure relief and vent module fluidly connectable to a head space above liquid within the cryogenic cylinder, a manual valve module fluidly connectable to the liquid within the cryogenic cylinder and to an external device, a solenoid valve module fluidly connectable to the manual valve module and to the head space within the cryogenic cylinder, a build-up coil fluidly connectable to the manual valve module and to the solenoid valve module, and a controller operatively connected to the solenoid valve module to control fluid flow through the solenoid valve module.

A cryogenic cylinder control system for regulating fluid within a cryogenic cylinder is disclosed. The system includes a pressure relief and vent module fluidly connectable to a head space above liquid within the cryogenic cylinder, a manual valve module fluidly connectable to the liquid within the cryogenic cylinder and to an external device, a solenoid valve module fluidly connectable to the manual valve module and to the head space within the cryogenic cylinder, a build-up coil fluidly connectable to the manual valve module and to the solenoid valve module, and a controller operatively connected to the solenoid valve module to control fluid flow through the solenoid valve module.

In accordance with an example, a process control system includes a fluidic line having a longitudinal axis and including a fluidic connection. The fluidic connection has an axis angled relative to the longitudinal axis of the fluidic line. The process control system includes a primary block valve having an inlet port and an outlet port. The inlet port is coupled to the fluidic connection. The process control system includes a monoflange including a male portion forming an inlet port and including an external threaded surface. The monoflange includes an outlet and a flanged interface surrounding the outlet port of the monoflange. The monoflange includes a bleed port. The monoflange includes a bleed valve adapted to control fluid flow from the bleed port and a secondary block valve adapted to control fluid flow from the outlet port. The external threaded surface of the male portion threadably engages the outlet port of primary block valve.