Valve device

• US 20070164247A1
• Filed: 10/06/2006
• Published: 07/19/2007
• Est. Priority Date: 10/14/2005
• Status: Active Grant

• Current Assignee: Yamatake Corporation
• Original Assignee: Yamatake Corporation
• Inventors: Makabe, Shousaku, Kojo, Kyoko, Yuzawa, Satoshi
• Granted Patent: US 7,753,339 B2
• Time in Patent Office: Days
• US Class Current: 251/214
• CPC Class Codes: F16K 41/02 with stuffing-box ; Sealing rings

Abstract

A valve device includes: a valve stem 4 vertically movably inserted in a staffing box 1; a gland packing 2 interposed between the staffing box 1 and the valve stem 4; a packing flange 9 disposed above the gland packing 2 through a packing follower 3; a spring case 6 that accommodates or holds Belleville springs 5, further abuts the packing flange 9 on its top face, and has groove portions 12 on its peripheral wall; and stud bolts 7 that press the gland packing 2 through the packing flange 9 and the spring case 6.

Claims

1. A valve device comprising:

a valve stem which is vertically movably inserted in a packing-accommodating means;

a gland packing interposed between the packing-accommodating means and the valve stem;

a packing flange which has a valve-stem accommodating hole provided at the center thereof and tightening-member accommodating holes provided around the periphery of this valve-stem accommodating hole, and which is disposed above the gland packing through a packing-pressing means;

a spring member having a valve-stem accommodating hole at the center thereof;

a spring case which has a valve-stem accommodating hole provided at the center thereof, and tightening-member accommodating grooves and windows that are provided on the peripheral wall thereof, accommodates or holds said at least one or more spring members in the bottom opening of the valve-stem accommodating hole, and which abuts the packing flange on the top closure thereof around the periphery of the valve-stem accommodating hole; and

a plurality of tightening members pressing the gland packing through the spring member, the spring case, and the packing flange.

2. A valve device according to claim 1, wherein the peripheral wall of the spring case is graduated.

3. A valve device according to claim 1, wherein the tightening-member accommodating grooves and the windows that are provided on the peripheral wall of the spring case are identically-shaped groove portions, and the groove portions become the tightening-member-accommodating grooves or the windows according to the circumferential position at which the spring case is disposed.

4. A valve device according to claim 1, wherein the packing flange and the spring case are integrated into a unitized flange.

5. A valve device according to claim 1, comprising a drop-preventing means at the bottom opening of the spring case.

6. A valve device comprising:

a valve stem which is vertically movably inserted in a packing-accommodating means;

a gland packing interposed between the packing-accommodating means and the valve stem;

a spring member having a valve-stem accommodating hole at the center thereof;

a packing flange which has a valve-stem accommodating hole provided at the center thereof and tightening-member accommodating holes provided around the periphery of this valve-stem accommodating hole, accommodates or holds said at least one or more spring members in the bottom opening of the valve-stem accommodating hole, and which is disposed above the gland packing through a packing-pressing means; and

a plurality of tightening members pressing the gland packing through the spring member and the packing flange.