A check valve (10) for reception in a fluid passage (5) comprises a valve seat element (1), a valve body (2), and a sleeve (3) wherein the valve body (2) is moveable in such a manner in the sleeve (3), that it rests in a first position on the valve seat element (1) and it is arranged a distance with respect to the valve seat element (1) in a second position. The valve seat element (1) contains an opening (11) which can be closed by the valve body (2) in the first position. A spring element (4) is arranged between the valve body (2) and the sleeve (3). The spring element comprises a first end (41) and a second end (42), wherein the valve body (2) is retained by the spring element (4) in the first position as long as the fluid pressure present in the opening (11) is smaller than the closing force of the spring element,(4), wherein the first end (41) of the spring element (4) is connected to the valve body (2). The sleeve (3) comprises a first jacket element (31) which is configured to be retained in the passage (5). The sleeve (3) comprises a second jacket element (32) which is configured to retain the second end (42) of the spring element (4). The spring element (4) is retained in an opening (33) of the second jacket element (32).

A pressure relief valve includes a housing, a poppet, and a spring. The housing includes an internal bore defined along a longitudinal axis of the housing and extending from an upper portion to a lower portion. A ledge or seat is defined within the bore. At least one lower portion hole is defined from an outer surface of the lower portion and into the bore. At least one upper portion hole is defined from an outer surface of the upper portion and into the bore. The poppet is slidably engaged within the internal bore. The poppet includes a head, a shaft, and an internal channel that runs longitudinally through the entire poppet. The head includes a shoulder. The spring is disposed within the bore at the upper portion of the housing and biases the poppet downwards so that the shoulder abuts the ledge or seat.

Disclosed herein is a check valve. The check valve installed in a bore of a modulator block having an inlet path and an outlet path and configured to control oil to flow in one direction, the check valve comprising: a valve housing installed in the bore, including an inlet and an outlet configured to respectively communicate with the inlet path and the outlet path, and having an open upper portion; a cap member configured to seal the open upper portion of the valve housing and fixed to the modulator block; a plunger provided to move forward or backward in the valve housing and configured to open or close an internal path between the inlet and the outlet; and a spring provided between the cap member and the plunger and configured to press the plunger to close the internal path.

In an example, a pressure relief valve is described. The pressure relief valve comprises a housing configured to allow fluid flow therethrough. The pressure relief valve also comprises an adapter having interior threads, where the adapter is attached to the housing such that the adapter is positioned at least partially within the housing. The pressure relief valve also comprises an orifice plate having an orifice formed therein to allow fluid flow therethrough, where the orifice plate comprises exterior threads that engage with the interior threads of the adapter to couple the orifice plate to the adapter. The pressure relief valve also comprises a spring disposed within the housing. The orifice plate translates via engagement of the exterior threads with the interior threads to calibrate a spring force of the spring.

A clutch regulator for vehicle comprises a main body provided with an oil passage inside thereof; an opening and closing member provided inside of the main body in a slide manner to open and close the oil passage; an elastic member configured to elastically press the opening and closing member toward the oil passage side; and a plug member installed in the main body to support the elastic member.

Flow control valves may be positioned downstream of water meters to increase pressure and compress entrained water vapour passing through the meters. However, turbulence within such valves can cause the valve's head to move radially, bending a shaft within the valve which may break. Accordingly, there is provided a flow control valve comprising: a housing having a flow passage; a valve seat defined within the flow passage; a valve head moveable to a closed position to engage the valve seat and seal the flow passage; a shaft secured to the valve head; a support slidingly mounting the shaft within the housing; a spring biasing the valve head to the closed position and configured to maintain the valve head in the closed position until a predetermined pressure is applied; and a guide assembly extending along at least a portion of the flow passage to constrain radial movement of the valve head.

In general terms, the present invention relates to a safety valve or a pressure relief valve (PRV) that is developed to be used in combination boilers and similar appliances and utilized for the purpose of controlling or limiting system pressure. Relief valves are generally used as safety devices in systems where fluid pressure is important, and they reduce the system pressure either by discharging fluid from the system or simply by interrupting the fluid conveyance in case of an emergency when there is an increase in pressure. The present invention relates to a pressure relief valve, the rear cover of which is attached to the body by means of a clawed structure and manufactured from entirely recyclable thermoplastic material.

A piston check valve system includes a body including an upstream end and a downstream end, a bonnet secured to a proximal opening of the body, and a piston secured within the body, the piston being moveable between a closed position in which the piston rests upon a valve seat and an open position in which the piston is spaced away from the valve seat. The piston check valve system also includes a retainer configured to guide and retain the piston and to secure the valve seat within the body.

The present invention relates to adjustable flow control valves, for example to an Adjustable Pressure Limiting (APL) valve. The adjustable valve (2) described comprises a valve body (4) comprising a valve seat (6), a valve member (10) movable relative to the valve seat (6), a first valve cap (20), a second valve cap (50) and a biasing element (30) to bias the valve member (10) away from the first valve cap (20). The first valve cap (20) is movable to increase the biasing force applied by the biasing element (30). The second valve cap (50) is engageable with the first valve cap (20) to prevent such movement of the first valve cap (20) beyond a selected position, but to allow movement of the first valve cap (20) in an opposite direction, way from said position.

The invention relates to a mechanical valve assembly used in the control of a fluid (e.g. gas, liquid, etc.) to provide at least one of a check valve control feature and flow range control feature. When unwanted low flows are present, the valve remains closed and jumps open only at higher desired flow rates. The valve then closes when the forces at the input and output equalize and the process repeats. Such allows fluid delivered to a flow meter in larger segregated bursts, rather than steady low flows that cause metering error.