A continuous run controller for a dual control compressor system includes an integrated housing containing a pilot valve and a hydraulic unloader valve. Low pressure in the hydraulic oil system opens the hydraulic unloader valve such that the suction valve unloader assembly unloads the compressor. High pressure in an air receiver of the compressor system opens the pilot valve such that the suction valve unloader assembly unloads the compressor.

A continuous run controller for a dual control compressor system includes an integrated housing containing a pilot valve and a hydraulic unloader valve. Low pressure in the hydraulic oil system opens the hydraulic unloader valve such that the suction valve unloader assembly unloads the compressor. High pressure in an air receiver of the compressor system opens the pilot valve such that the suction valve unloader assembly unloads the compressor.

An aspirator air vent valve may include an air vent valve body coupled with an aspirator body and a pipe fitting. The air vent valve body may include an air vent valve air channel defined by an inner wall of the air vent valve body and disposed between the aspirator body and the pipe fitting. The aspirator air vent valve may further include a vent passage defined by a first vent wall and a second vent wall and disposed between an outer wall and the inner wall of the air vent valve body, wherein the vent passage is in fluid communication with the air vent valve air channel. The aspirator air vent valve may further include a plunger coupled with the air vent valve body.

The present invention comprises a unibody check valve for detachable use with a submersible pump, said check valve comprising a unibody housing with an inlet and an outlet defining a fluid passage, where a portion of the face of the outlet comprises a poppet seat, and a poppet stem enclosing member held in axial alignment with the fluid passage by one or more supporting members, a poppet slidably retained within said poppet stem enclosing member, and a biasing member captured between the one or more supporting members and a poppet stem base, where the biasing member biases the poppet head into a closed position against the seat when liquid flow is not sufficient to overcome the force of the biasing member, and where the poppet head is pushed away from the seat when liquid flow is sufficient to overcome the force of the biasing member.

An apparatus includes a chamber, a valve coupled to the chamber, a pump coupled to the chamber, a control circuit coupled to the pump, and a lever coupled to the valve, the pump, and the control circuit. Operation of the valve and the pump is controlled based on a position of the lever.

A liquid delivery device includes a constant flow valve, a pump and channels. A medicinal solution bag is connected to the liquid delivery device. The pump has a suction aperture, a discharge aperture and check valves. The constant flow valve includes a valve casing and a diaphragm that partitions the interior of the valve casing to form a first valve chamber and a second valve chamber. A first opening, a second opening, and a third opening are provided in the valve casing. A conical spring arranged between and in contact with a top plate and the diaphragm is provided in the second valve chamber. The spring applies a pressure towards an O-ring side to a second main surface of the diaphragm.

A valve for a reciprocating machine is disclosed. The valve includes a seat provided with flow apertures therein. A valve closing member is adapted to co-act with the seat for selectively closing and opening the flow apertures. A cage is connected to the seat and forms a guide, in which the actuation stem of a valve closing member is slidingly engaged and guided.

A valve for a reciprocating machine is disclosed. The valve includes a seat provided with flow apertures therein. A valve closing member is adapted to co-act with the seat for selectively closing and opening the flow apertures. A cage is connected to the seat and forms a guide, in which the actuation stem of a valve closing member is slidingly engaged and guided.

A box lubricator that includes a pump with a piston housing and piston. The piston housing extends from a first end to a second end, and includes a bore extending through the piston housing from the first end of the piston housing to the second end of the piston housing. The piston housing also includes a recess disposed at the second end of the piston housing, the recess being concentric with the bore and comprising a diameter larger than a diameter of the bore. The piston is disposed inside the bore of the piston housing. At least one elastomeric seal is disposed inside the recess of the piston housing and around the piston. In some embodiments, a ball and socket joint connects the piston to the rocker arm assembly. In some embodiments, a fluid passage and a check valve are disposed inside the piston.

A box lubricator that includes a pump with a piston housing and piston. The piston housing extends from a first end to a second end, and includes a bore extending through the piston housing from the first end of the piston housing to the second end of the piston housing. The piston housing also includes a recess disposed at the second end of the piston housing, the recess being concentric with the bore and comprising a diameter larger than a diameter of the bore. The piston is disposed inside the bore of the piston housing. At least one elastomeric seal is disposed inside the recess of the piston housing and around the piston. In some embodiments, a ball and socket joint connects the piston to the rocker arm assembly. In some embodiments, a fluid passage and a check valve are disposed inside the piston.