Abrégé

A check valve (1) comprises a moving body (30), a valve box (10), a valve cylinder (14), a primary flow path (40), and a secondary flow path (50). The moving body (30) is a member capable of linearly reciprocating between a closed state in which the moving body (30) is in close contact with a valve seat (12) and an open state in which the moving body (30) is separated from the valve seat (12). The valve box (10) is a member including the valve cylinder (14). The valve seat (12) is fixed to the valve box (10). The valve cylinder (14) is a member extending in the moving direction of the moving body (30), and is a member in which the moving body (30) moves. The primary flow path (40) is located on the upstream side of the valve cylinder (14), and has an axial center in a straight main axis direction. The secondary flow path (50) is located on the downstream side of the valve cylinder (14), and has an axial center in the main axis direction. The flow direction of a first main flow of fluid passing through the inside of the valve cylinder (14) from the upstream side toward the downstream side has more components in the moving direction of the moving body (30) than components in the main axis direction.

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

y) on an outside-corner side of the flow path in the inlet pipe body part is formed so as to curve toward a side of the outlet pipe body part as a position gets closer from the inflow port to the seat.

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage

Produits et services

Metal valves not being parts of machines Plumbing fittings, namely, foot valves for building pipes; plumbing fittings, namely, check valves for building pipes

Abrégé

d) in a cross section including the center line thereon.

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

A check valve (1) comprises: an inlet tube portion (23) having an inlet (23b); an outlet tube portion (25) having an outlet (25b); a movable body (reciprocating body (2)) operable between a position for stopping the flow of a fluid and a position for allowing the flow of the fluid; and a valve casing (12) for receiving the reciprocating body 2. The inlet tube portion (23), the outlet tube portion (25), and the valve casing (12) communicate with each other in the inside, and internally define a flow channel curved from the inlet (23b) toward the outlet (25b). The reciprocating body (2) has a valve body (6). The inlet tube portion (23) is provided with a valve seat (23c). The valve seat (23c) is disposed so as to support the valve body (6), and the inlet (23b) and the valve seat (23c) are arranged in parallel to each other. An inner wall surface (23y) of the inlet tube portion (23) on an outer-track side of the flow channel is formed to be curved so as to become closer to the outlet tube portion (25) side in the direction from the inlet (23b) to the valve seat (23c).

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage

Abrégé

A check valve (1) is a straight-point-joint type of diagonal lift valve. The check valve (1) comprises a valve seat (12a), a moving body (2) that can linearly reciprocate between a closed state of being in close contact with the valve seat (12a) and an open state of being separated from the valve seat (12a), a primary flow path (inflow path (12c)) situated on the upstream side of the moving body (2), and a secondary flow path (outflow path (12d)) situated on the downstream side of the moving body (2). The moving body (2) includes a valve body (6) and a valve shaft (7) extending from the valve body (6). The valve seat (12a), which supports the valve body (6), is characterized by being formed so that in a cross section including a center line (CL) of a linearly extending connecting flow path including the primary flow path (inflow path 12c) and the secondary flow path (outflow path 12d), the valve seat (12a) spans across the center line (CL).

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

c).

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide
• F16K 27/02 - Structures des logementsMatériaux utilisés à cet effet des soupapes de levage

Abrégé

A reciprocating body (2) comprises: a valve body (6) including a turning face (10a); a valve shaft (7) which is guided by a guide tube (4); and an annular packing (8) which circumferentially closely attaches to a valve seat (12a) when the reciprocating body (2) is in closed position. The valve body (6) includes a large-diameter portion (9a), a small-diameter portion (9b) extending from the large-diameter portion (9a) toward a primary flow passageway side, and a turning portion (10). The large-diameter portion (9a) has on the primary flow passageway side a flange face (9d) that supports the packing (8) in a state in which the packing (8) is exposed on the primary flow passageway side. The flange face (9d) is formed so as to be able to abut on the valve seat (12a) with the packing (8) therebetween. A recess (9c) is formed in an outer periphery of the small-diameter portion (9b). A part of the packing (8) is fit in the recess (9c).

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

A reciprocating body (2) has a valve element (6)
which includes a deflecting surface (10a), a valve shaft
(7) which is guided by a guide cylinder (4), and a
packing (8) having an annular shape which is circularly
brought into close contact with a valve seat (12a) in a
state where the reciprocating body (2) is in a closed
position. The valve element (6) includes a large
diameter portion (9a), and a small diameter portion (9b)
and a deflecting portion (10) extending from the large
diameter portion (9a) toward the primary flow passage
side. The large diameter portion (9a) has, on the
primary flow passage side, a flange surface (9d) which
supports the packing (8) in a state where the packing (8)
is exposed to the primary flow passage side. The flange
surface (9d) is formed such that the flange surface (9d)
is allowed to come into contact with the valve seat (12a)
via the packing (8). A recess (9c) is formed on the
outer periphery of the small diameter portion (9b), and a
portion of the packing (8) is fitted in the recess (9c).

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

- 46 -
ABSTRACT
The check valve (1) is of straight pipe joint type
and oblique lift type. The check valve (1) includes: a
valve seat (12a); a moving body (2) capable of linearly
reciprocating between a closed state where it is in close
contact with the valve seat (12a) and an open state where
it is separated from the valve seat (12a); a primary flow
path (inflow path (12c)) on an upstream side of the
moving body (2); and a secondary flow path (outflow path
(12d)) on a downstream side of the moving body (2). The
moving body (2) includes a valve body (6) and a valve
shaft (7) extending from the valve body (6). The valve
seat (12a) supporting the valve body (6) is formed to
straddle the center line (CL) of the connection flow path
that linearly extends including the primary flow path
(inflow path 12c) and the secondary flow path (outflow
path 12d) in a cross section including the center line
(CL) thereon.
Date Recue/Date Received 2020-10-19

Classes IPC  ?

• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide