US 11,655,898 B2
Cryogenic globe valve
Mitsuru Hosokawa, Chiba (JP); and Tetsuya Watanabe, Chiba (JP)
Assigned to KITZ CORPORATION, Chiba (JP)
Appl. No. 17/290,588
PCT Filed Nov. 1, 2019, PCT No. PCT/JP2019/043014
§ 371(c)(1), (2) Date Apr. 30, 2021,
PCT Pub. No. WO2020/091037, PCT Pub. Date May 7, 2020.
Claims priority of application No. JP2018-206409 (JP), filed on Nov. 1, 2018.
Prior Publication US 2022/0003324 A1, Jan. 6, 2022
Int. Cl. F16K 1/38 (2006.01); F16K 1/48 (2006.01); F16K 25/00 (2006.01)
CPC F16K 1/38 (2013.01) [F16K 1/48 (2013.01); F16K 25/005 (2013.01)] 12 Claims
OG exemplary drawing
1. A cryogenic globe valve comprising:
a body portion;
an axial cylindrical portion having a long-neck structure extended into the body portion;
an elongated stem having an insertion portion provided in a lower of end of the elongated stem; and
a resin-made valve disk attached to a lower end of the elongated stem, the resin-made valve disk having a conical surface defining a reduced-diameter tapered shape,
wherein an attachment portion is provided in an upper part of the resin-made valve disk, and the attachment portion is inserted into the insertion portion of the elongated stem,
a through hole is formed in a direction intersecting a length direction of the stem in the insertion portion and the attachment portion,
a fixing member is inserted into the through hole to attach the attachment portion and the insertion portion to each other,
a gap is provided between the fixing member and the through hole to maintain a clearance in which the resin-made valve disk is movable when the resin-made valve disk thermally contracts, and
a vertical width of the clearance between facing surfaces of the through hole and the fixing member under an extremely low temperature condition is set to 0.5% or more of a seal diameter of the resin-made valve disk such that the resin-made valve disk is three-dimensionally operable with respect to the stem even under an extremely low-temperature condition.