Abstract: There is provided a check valve capable of effectively suppressing the generation of chattering. The check valve includes: a housing including an inlet channel, a valve chest, and an outlet channel; a seat member provided around the inlet channel, the seat member including a seat portion; a valve element pressed against the seat portion to close the inlet channel; a biasing member configured to push the valve element toward a valve seat; a guide portion provided at the housing and configured to guide the valve element when the valve element moves in an axial direction; and a damper chamber communicating with the valve chest through a space between the valve element and the guide portion, the damper chamber being configured to attenuate axial moving force of the valve element. The biasing member is arranged in the valve chest.

Abstract: A glass ball safety valve includes: a housing including a valve passage connecting a first and second port; a valve element provided in the housing so as to close the passage, the element being movable in an open direction so as to open the passage; a biasing spring configured to bias the element in the open direction; a glass ball provided in the housing so as to support the element against biasing force of the biasing spring with a space between the element and the housing in the open direction, the glass ball including a longitudinal-direction intermediate portion that breaks at a predetermined temperature, the glass ball in a broken state allowing a movement of the valve element in the open direction; and a holding body provided in the housing and holding at least one of a first longitudinal-direction end-side portion and second longitudinal-direction end-side portion of the glass ball.

Abstract: A check valve capable of being reduced in size and suppressing the generation of chattering, including: a seat member arranged at a channel of a fluid including a large-diameter portion, small-diameter portion, and seat portion, the large and small-diameter portions provided at an inner periphery of the seat member, the seat portion provided between the large and small-diameter portions; a valve element pressed against the seat portion to close the channel; and a casing including a valve chest accommodating the valve element so the valve element is movable in an axial direction. The large-diameter portion has an inner diameter larger than an outer diameter of the valve element which enters in the axial direction. A space through which fluid flows is formed between the large-diameter portion and the valve element. The diameter of the large-diameter portion is equal to or less than 1.2 times the diameter of the valve element.

Abstract: A pressure regulator valve includes: a housing including a base, a cover, and a body; a valve element configured to open and close a valve passage by moving between a closed position and an open position, the valve element being further configured to reduce a primary pressure to a secondary pressure and receive the secondary pressure by which the valve element moves toward the closed position; a biasing unit accommodated in an accommodating space formed between the body and the cover, the biasing unit being configured to bias the valve element such that the valve element moves toward the open position; a first sealing member provided at a gap between the base and the body; and a second sealing member provided a gap between the base and the cover and made of synthetic rubber. The second sealing member is arranged away from the body.

Abstract: A glass ball safety valve includes: a housing including a valve passage connecting a first and second port; a valve element provided in the housing so as to close the passage, the element being movable in an open direction so as to open the passage; a biasing spring configured to bias the element in the open direction; a glass ball provided in the housing so as to support the element against biasing force of the biasing spring with a space between the element and the housing in the open direction, the glass ball including a longitudinal-direction intermediate portion that breaks at a predetermined temperature, the glass ball in a broken state allowing a movement of the valve element in the open direction; and a holding body provided in the housing and holding at least one of a first longitudinal-direction end-side portion and second longitudinal-direction end-side portion of the glass ball.

Abstract: A pressure regulator valve includes: a housing including a base, a cover, and a body; a valve element configured to open and close a valve passage by moving between a closed position and an open position, the valve element being further configured to reduce a primary pressure to a secondary pressure and receive the secondary pressure by which the valve element moves toward the closed position; a biasing unit accommodated in an accommodating space formed between the body and the cover, the biasing unit being configured to bias the valve element such that the valve element moves toward the open position; a first sealing member provided at a gap between the base and the body; and a second sealing member provided a gap between the base and the cover and made of synthetic rubber. The second sealing member is arranged away from the body.