Title:
SEAL FOR FLOW CONTROL VALVE AND FLOW CONTROL VALVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/230782
Kind Code:
A1
Abstract:
To provide a seal for a flow control valve and a flow control valve device provided with the seal such that the seal can be easily and inexpensively manufactured with low leakage and low friction. A seal 6 is an annular seal in sliding contact with an outer surface 4a of a rotor 4, the seal 6 being used for a valve device 1 comprising a housing 2 having an introduction portion 5 and the resin rotor 4 that is provided in the housing 2, has the spherical outer surface 4a and a rotor opening 4b, and rotates with respect to the housing 2. The seal 6 is substantially L-shaped in cross section in the axial direction. One of two side portions forming the substantially L-shaped seal forms a cylindrical portion 6a and the other side portion forms a seal lip portion 6b that extends inward from the rotor-side end of the cylindrical portion 6a and is in sliding contact with the outer surface 4a of the rotor 4. A relational expression (d2 - d1)/2 < L is satisfied where d1 is the inside diameter of the seal 6, d2 is the inside diameter of the rotor opening 4b, and L is the length of the seal lip portion 6b in a radial direction.
Inventors:
YASUDA KEN (JP)
Application Number:
PCT/JP2022/018624
Publication Date:
November 03, 2022
Filing Date:
April 22, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16K5/04; F16K5/06
Foreign References:
| JP2017133616A | 2017-08-03 | |||
| JP2020106149A | 2020-07-09 | |||
| JPH08247306A | 1996-09-27 | |||
| JP2015218775A | 2015-12-07 |
Attorney, Agent or Firm:
WAKI Hikaru et al. (JP)
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