JPH0765687B2 - Gate valve - Google Patents
Gate valveInfo
- Publication number
- JPH0765687B2 JPH0765687B2 JP61097552A JP9755286A JPH0765687B2 JP H0765687 B2 JPH0765687 B2 JP H0765687B2 JP 61097552 A JP61097552 A JP 61097552A JP 9755286 A JP9755286 A JP 9755286A JP H0765687 B2 JPH0765687 B2 JP H0765687B2
- Authority
- JP
- Japan
- Prior art keywords
- valve plate
- valve
- seal
- guide cylinder
- outer peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012530 fluid Substances 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 210000004907 gland Anatomy 0.000 description 10
- 238000012856 packing Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Sliding Valves (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、弁プレートを流体の流動方向に対して直角
な方向に移動させるようにした仕切弁に関するものであ
る。TECHNICAL FIELD The present invention relates to a sluice valve in which a valve plate is moved in a direction perpendicular to a fluid flow direction.
粉粒体、スラリー等の摩耗流体の輸送ラインには、仕切
弁が非常に多く用いられている。この仕切弁は、第８図
に示すように、筒形ボデイ１を備え、そのボデイ１にシ
ートボツクス２を設け、このシートボツクス２の内部か
らボデイ１の内部に向けて弁プレート５をスライド可能
に設け、上記弁プレート５の移動によつてボデイ１の流
路１′を開閉するようにしてある。A sluice valve is very often used in a transportation line for wear fluid such as powder or granules and slurry. As shown in FIG. 8, this sluice valve has a tubular body 1, a seat box 2 is provided on the body 1, and a valve plate 5 can be slid from the inside of the seat box 2 toward the inside of the body 1. The flow path 1'of the body 1 is opened and closed by the movement of the valve plate 5.
なお、弁プレート５の移動には、その弁プレート５に設
けたステムの外周にねじを設け、このねじにねじ係合し
たナツトをハンドルで保持し、このハンドルを手動によ
つて回転させるようにしたものや、弁プレートにシリン
ダを接続し、そのシリンダを作動させるようにしたもの
などがある。In order to move the valve plate 5, a screw is provided on the outer periphery of the stem provided on the valve plate 5, the nut screw-engaged with the screw is held by a handle, and the handle is manually rotated. There are also those that connect the cylinder to the valve plate and operate the cylinder.
このような仕切弁は、いうまでもなく、良好なシール性
が要求される。その要求に応えるため、第８図に示す従
来の仕切弁は、シートボツクス２の内部にグランドパツ
キン18′を組込み、そのグランドパツキン18′の内面を
弁プレート５の外周面に密着してシートボツクス２から
の漏洩を防止するようにしている。Needless to say, such a gate valve is required to have a good sealing property. In order to meet the demand, the conventional sluice valve shown in FIG. 8 incorporates a gland packing 18 'inside the seat box 2, and the inner surface of the gland packing 18' is closely attached to the outer peripheral surface of the valve plate 5. The leak from 2 is prevented.
また、ボデイ１の流路の内径面にシートリング20を設
け、そのシートリング20のシート面21との間に所要の間
隔をおいて複数の突起22を形成し、この突起22が弁プレ
ート５の先端の傾斜面23を押す作用によつて全閉状態と
なるようにしている。Further, a seat ring 20 is provided on the inner diameter surface of the flow path of the body 1, and a plurality of projections 22 are formed at a required distance from the seat surface 21 of the seat ring 20. A fully closed state is achieved by the action of pushing the inclined surface 23 at the tip of the.
しかしながら、上記のような仕切弁においては、シート
リング20と弁プレート５とを面接触させるシールである
ため、接触面に異物を噛み込むおそれがあり、異物を噛
み込むと両者間に隙間が生じ、シール性に問題がある。However, in the sluice valve as described above, since it is a seal that brings the seat ring 20 and the valve plate 5 into surface contact, foreign matter may be caught in the contact surface, and when the foreign matter is caught, a gap is created between them. There is a problem with the sealability.
また、弁プレート５にグランドパツキン18′の内面を圧
接させるシール構造であるため、弁プレート５の移動時
に、その弁プレート５はグランドパツキン18′の内面に
沿つて摺動するのでグランドパツキン18′が摩耗しシー
ル性が悪くなるという不都合がある。Further, since the inner structure of the gland packing 18 'is brought into pressure contact with the valve plate 5, the valve plate 5 slides along the inner surface of the gland packing 18' when the valve plate 5 moves, so that the gland packing 18 ' However, there is an inconvenience that it is worn out and the sealing property is deteriorated.
さらに、グランドパツキン18′の締付けむらにより、弁
プレート５の開閉動作が不確実になり、しかも弁プレー
ト５に対する接触抵抗が大きいため、弁プレート５の開
閉に大きな駆動トルクを必要とする不都合もある。Further, due to the uneven tightening of the gland packing 18 ', the opening / closing operation of the valve plate 5 becomes uncertain, and since the contact resistance to the valve plate 5 is large, a large driving torque is required to open / close the valve plate 5. .
そこで、この発明は上記の不都合を解消し、仕切弁のシ
ール性の向上と、弁プレートの開閉に要する駆動トルク
の減少とを図ることを技術的課題としている。Therefore, it is a technical object of the present invention to solve the above-mentioned inconvenience, to improve the sealing property of the sluice valve, and to reduce the driving torque required to open and close the valve plate.
上記の課題を解決するために、この発明は、筒形ボディ
の外周一部に弁ガイド筒を設け、その弁ガイド筒内に挿
通された弁プレートをボディ内部に向けて移動して、上
記ボディの流路を閉じるようにした仕切弁において、前
記ボディの内周面に閉鎖状態とされた弁プレートの外周
に沿うシール溝を設け、そのシール溝に嵌合される外周
シール部の両端部に前記弁ガイド筒内に配置される柱部
を設けた環状のシール部材を弾性体で形成し、そのシー
ル部材の両端部内周と係合する突出部を前記シール溝の
開口両側と弁ガイド筒の内面とに設け、前記柱部に前記
弁プレートが挿通される挿通孔を形成し、その挿通孔の
両側に設けられた一対の面シール部と前記外周シール部
の外周囲に互に連通する流体通路を形成し、前記ボデイ
にはその流体通路に連通する給排孔を形成した構成とし
たのである。In order to solve the above-mentioned problems, the present invention provides a valve guide cylinder on a part of the outer periphery of a cylindrical body, moves a valve plate inserted in the valve guide cylinder toward the inside of the body, and In the sluice valve configured to close the flow path of, a seal groove is provided along the outer periphery of the closed valve plate on the inner peripheral surface of the body, and both ends of the outer peripheral seal part fitted in the seal groove are provided. An annular seal member provided with a columnar portion arranged in the valve guide cylinder is formed of an elastic body, and protrusions engaging with inner circumferences of both ends of the seal member are provided on both sides of the opening of the seal groove and the valve guide cylinder. A fluid which is provided on the inner surface and has an insertion hole through which the valve plate is inserted in the column portion, and a pair of surface seal portions provided on both sides of the insertion hole and the outer periphery of the outer peripheral seal portion communicate with each other. Forming a passage, and the fluid passage in the body It was a structure of forming the feed and discharge holes communicating.
上記プレートをボデイの内部に向けて移動し、その弁プ
レートがボデイの流路を閉じる状態において、上記給排
孔にエア等の流体を供給すると、その流体は流体流路を
流れるため、弾性シール部材の外周シール部および面シ
ール部の挿通孔の内面が内方向に変形する。その変形量
が大きくなると、上記外周シール部が弁プレートの先端
部外周面および両側面に沿つて密着し、また、挿通孔の
内面が弁プレートの両側面に密着し、その密着によつて
ボデイの流路を流動する流体の漏洩を防止する。When a fluid such as air is supplied to the supply / discharge hole while the plate is moved toward the inside of the body and the valve plate closes the flow passage of the body, the fluid flows through the fluid flow passage, so the elastic seal The inner surfaces of the insertion holes of the outer peripheral seal portion and the face seal portion of the member are deformed inward. When the amount of deformation increases, the outer peripheral seal portion adheres closely to the outer peripheral surface of the tip portion of the valve plate and both side surfaces, and the inner surface of the insertion hole adheres to both side surfaces of the valve plate. The leakage of the fluid flowing through the channel is prevented.
以下、この発明の実施例を添付図面に基づいて説明す
る。Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図乃至第４図に示すように、筒状ボデイ１の外周上
部には弁ガイド筒２が設けられ、そのシートボツクス２
の頂壁３にはボデイ内径にほぼ等しい幅寸法の細長い開
口４が設けられている。この開口４に挿通した弁プレー
ト５はボデイ１の径方向に移動可能になり、その先端部
はボデイ１の内径面に適合する半円形になつている。As shown in FIGS. 1 to 4, a valve guide cylinder 2 is provided on the outer peripheral upper portion of the cylindrical body 1, and the seat box 2 thereof is provided.
The top wall 3 is provided with an elongated opening 4 having a width dimension substantially equal to the inner diameter of the body. The valve plate 5 inserted through the opening 4 is movable in the radial direction of the body 1, and the tip end thereof has a semicircular shape that fits the inner diameter surface of the body 1.
上記弁プレート５の上部にはシリンダ６のピストンロツ
ド７が接続され、そのシリンダ６の作動によつて弁プレ
ート５が移動する。The piston rod 7 of the cylinder 6 is connected to the upper portion of the valve plate 5, and the valve plate 5 moves according to the operation of the cylinder 6.
なお、弁プレート５を移動させる機構はこれに限定され
るものではない。The mechanism for moving the valve plate 5 is not limited to this.
前記ボディ１の内径面には、閉鎖状態とされた弁プレー
ト５の外周に沿つてシール溝８が形成され、そのシール
溝４に弾性を有するシール部材９の外周シール部10が嵌
合されている。シール部材９は、上記外周シール部10の
両端間に延びる柱部11を有し、その柱部11が前記弁ガイ
ド筒２内に収納されている。A seal groove 8 is formed on the inner diameter surface of the body 1 along the outer circumference of the valve plate 5 in the closed state, and an outer peripheral seal portion 10 of an elastic seal member 9 is fitted into the seal groove 4. There is. The seal member 9 has a pillar portion 11 extending between both ends of the outer peripheral seal portion 10, and the pillar portion 11 is housed in the valve guide cylinder 2.
上記シール部材９の内周面両側部には段部12が形成さ
れ、その段部12に係合する突出部13がシール溝８の開口
部両側および弁ガイド筒２の下側開口の両側部に形成さ
れている。Step portions 12 are formed on both sides of the inner peripheral surface of the seal member 9, and projecting portions 13 engaging with the step portions 12 are provided on both sides of the opening of the seal groove 8 and both sides of the lower opening of the valve guide cylinder 2. Is formed in.
また、弾性シール部材９の外周シール部10の外周面には
溝が形成され、その溝が流体通路14になつている。A groove is formed on the outer peripheral surface of the outer peripheral seal portion 10 of the elastic seal member 9, and the groove serves as the fluid passage 14.
さらに、弾性シール部材９の柱部11には、上記弁プレー
ト５が挿通可能な挿通孔15が形成され、その挿通孔15は
弁プレート５が非接触の状態で移動可能な大きさになつ
ている。Further, the column portion 11 of the elastic seal member 9 is formed with an insertion hole 15 through which the valve plate 5 can be inserted, and the insertion hole 15 has a size such that the valve plate 5 can move in a non-contact state. There is.
上記挿通孔15の形成により、その挿通孔15の両側に一対
の面シール部11aが設けられ、各面シール部11aに流体通
路16が形成され、その通路16の両端部は前記の流体通路
14と連通している。この流体通路14には、ボデイ１に形
成した給排孔17と連通し、その給排孔17に例えば圧縮エ
アを供給すると、外周シール部10および面シール部11の
挿通孔15内面が内方に変形する。Due to the formation of the insertion hole 15, a pair of face seal portions 11a are provided on both sides of the insertion hole 15, a fluid passage 16 is formed in each face seal portion 11a, and both ends of the passage 16 are the above-mentioned fluid passages.
Communicates with 14. The fluid passage 14 communicates with a supply / discharge hole 17 formed in the body 1, and when, for example, compressed air is supplied to the supply / discharge hole 17, the inner surface of the insertion hole 15 of the outer peripheral seal portion 10 and the surface seal portion 11 is inward. Transforms into.
前記弁ガイド筒２の内部にはグランドパツキン18が組込
まれ、そのグランドパツキン18の内周は弁プレート５に
密着している。このグランドパツキン18は、ボデイ１の
流路１′の開放時のみ、その流路１′を流れる流体が弁
ガイド筒２から外部に漏洩するのを防止するためのもの
であるため、弁プレート５に対する接触抵抗の小さいも
のが用いられている。A gland packing 18 is incorporated in the valve guide cylinder 2, and the inner circumference of the gland packing 18 is in close contact with the valve plate 5. The gland packing 18 is for preventing the fluid flowing through the flow passage 1 ′ from leaking from the valve guide cylinder 2 to the outside only when the flow passage 1 ′ of the body 1 is opened. The one having a small contact resistance to is used.
いま、弁プレート５をボデイ１の内部に向けて移動し、
ボデイ１の流路１′を閉じる状態において給排孔17から
流体通路14に圧力流体を供給すると、弾性シール部材９
の外周シール部が内方向に変形して第５図および第６図
に示すように、弁プレート５の先端部外周および両側縁
に密着する。また、流体通路14に供給された圧力流体は
面シール部11aの流体通路16にも流れるため、面シール
部11aが内方向に変形して第６図に示すように弁プレー
ト５の両側面に密着する。Now, move the valve plate 5 toward the inside of the body 1,
When the pressure fluid is supplied from the supply / discharge hole 17 to the fluid passage 14 with the flow passage 1'of the body 1 closed, the elastic seal member 9
The outer peripheral seal portion is deformed inward and comes into close contact with the outer periphery of the front end portion and both side edges of the valve plate 5, as shown in FIGS. 5 and 6. Further, the pressure fluid supplied to the fluid passage 14 also flows to the fluid passage 16 of the face seal portion 11a, so that the face seal portion 11a is deformed inward, and as shown in FIG. In close contact.
上記のような外周シール部10および面シール部11aの弁
プレート５に対する密着によつてボデイ１の流路１′は
完全な遮断状態に保持され、しかも弁ガイド筒２の内部
においては弁プレート５に対して面シール部11aおよび
グランドパツキン18の内面が接触するため、二重にシー
ルされ、流体の外部漏洩が完全に防止される。The passage 1'of the body 1 is kept in a completely closed state due to the close contact of the outer peripheral seal portion 10 and the face seal portion 11a with the valve plate 5 as described above, and in the inside of the valve guide cylinder 2, the valve plate 5 is held. Since the surface seal portion 11a and the inner surface of the gland packing 18 are in contact with each other, they are doubly sealed and the fluid is completely prevented from leaking to the outside.
なお、第１図に示すように、ボデイ１の流路１′の下流
側に弁プレート５に対して当接可能な突出部19を設けて
おくと、その突出部19によつて弁プレート５を支持する
ことができるため、上記弁プレート５が流体の圧力によ
つて下流側に移動したり、変形したりするのを防止する
ことができるため、シール保持に効果を挙げることがで
きる。As shown in FIG. 1, if a protruding portion 19 that can contact the valve plate 5 is provided on the downstream side of the flow path 1 ′ of the body 1, the protruding portion 19 allows the valve plate 5 to contact. Can be supported, so that the valve plate 5 can be prevented from moving to the downstream side or being deformed due to the pressure of the fluid, which is effective for holding the seal.
ボデイ１の流路１′の開放に際しては、給排孔17を開放
して流体通路14の圧力流体を外部に排出してから弁プレ
ート５をボデイ１の外径方向に移動させる。このとき、
圧力流体の外部排出によつて外周シール部10および面シ
ール部11aの挿通孔15の内面が自己の弾性により収縮し
て弁プレート５より離反するため、弁プレート５をきわ
めて小さな駆動トルクで移動させることができる。When the flow passage 1'of the body 1 is opened, the supply / discharge hole 17 is opened to discharge the pressure fluid in the fluid passage 14 to the outside, and then the valve plate 5 is moved in the outer diameter direction of the body 1. At this time,
When the pressure fluid is discharged to the outside, the inner surface of the insertion hole 15 of the outer peripheral seal portion 10 and the face seal portion 11a contracts due to its elasticity and separates from the valve plate 5, so that the valve plate 5 is moved with an extremely small driving torque. be able to.
実施例の場合は、面シール部11aに流体通路16を形成し
て挿通孔15の両側部をチユーブ状としたものを示した
が、外周シール部10と同様に面シール部11の両側面に溝
状の流体通路を形成してもよい。また、外周シール部10
を逆にチユーブ状としてもよい。In the case of the embodiment, the fluid passage 16 is formed in the face seal portion 11a and the both sides of the insertion hole 15 are shown in a tube shape. A groove-shaped fluid passage may be formed. Also, the outer peripheral seal portion 10
On the contrary, it may be shaped like a tube.
以上のように、この発明においては、通路に圧力流体を
供給すると、シール部材の外周シール部および一対の面
シール部が内方向に変形して弁プレートに密着し、その
外周シール部が密着する弁プレートの外周部は、粉体等
の異物の付着がきわめて少ない部分であるため、弁プレ
ートと外周シール部間における異物の噛み込みは殆んど
なく、閉鎖状態とされた弁プレートの周囲をきわめて良
好にシールすることができる。As described above, in the present invention, when the pressure fluid is supplied to the passage, the outer peripheral seal portion and the pair of face seal portions of the seal member are deformed inwardly and are brought into close contact with the valve plate, and the outer peripheral seal portion is brought into close contact. The outer peripheral portion of the valve plate is a portion where foreign matter such as powder adheres very little, so there is almost no foreign matter caught between the valve plate and the outer peripheral seal portion, and the periphery of the closed valve plate is almost eliminated. It can seal very well.
また、通路内の流体を排出すると、外周シール部および
面シール部が自己の弾力により収縮して弁プレートから
離反するため、弁プレートの移動時、弁プレートはシー
ル部材に対して非接触で移動し、弁プレートを小さな駆
動力によって開閉させることができる。Also, when the fluid in the passage is discharged, the outer peripheral seal part and the face seal part contract due to their own elasticity and separate from the valve plate, so when the valve plate moves, the valve plate moves without contact with the seal member. However, the valve plate can be opened and closed with a small driving force.
第１図は、この発明に係る仕切弁の一実施例を示す縦断
正面図、第２図は第１図のII−II線に沿つた断面図、第
３図は第１図のIII−III線に沿つた断面図、第４図は同
上の弾性シール部材を示す半断面の斜視図、第５図は同
上のシール状態を示す縦断正面図、第６図は第５図のＶ
−Ｖ線に沿つた断面図、第７図のVI−VI線に沿つた断面
図、第８図は従来の仕切弁を示す縦断正面図である。 １…ボデイ、２…弁ガイド筒、５…弁プレート、８…シ
ール溝、９…シール部材、10…外周シール部、11…柱
部、11a…面シール部、14…流体通路、15…挿通孔、16
…通路、17…給排孔FIG. 1 is a vertical sectional front view showing an embodiment of a sluice valve according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is III-III in FIG. 4 is a sectional view taken along the line, FIG. 4 is a perspective view of a half section showing the elastic seal member of the above, FIG. 5 is a vertical sectional front view showing the sealed state of the same, and FIG. 6 is a V of FIG.
A sectional view taken along the line -V, a sectional view taken along the line VI-VI in Fig. 7, and Fig. 8 are longitudinal sectional front views showing a conventional sluice valve. DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Valve guide cylinder, 5 ... Valve plate, 8 ... Seal groove, 9 ... Seal member, 10 ... Peripheral seal part, 11 ... Column part, 11a ... Face seal part, 14 ... Fluid passage, 15 ... Insertion Hole, 16
... passage, 17 ... supply and discharge hole
Claims (1)
け、その弁ガイド筒内に挿通された弁プレートをボディ
内部に向けて移動して、上記ボディの流路を閉じるよう
にした仕切弁において、前記ボディの内周面に閉鎖状態
とされた弁プレートの外周に沿うシール溝を設け、その
シール溝に嵌合される外周シール部の両端部に前記弁ガ
イド筒内に配置される柱部を設けた環状のシール部材を
弾性体で形成し、そのシール部材の両端部内周と係合す
る突出部を前記シール溝の開口両側と弁ガイド筒の内面
とに設け、前記柱部に前記弁プレートが挿通される挿通
孔を形成し、その挿通孔の両側に設けられた一対の面シ
ール部と前記外周シール部の外周囲に互に連通する流体
通路を形成し、前記ボディにはその流体通路に連通する
給排孔を設けた仕切板。1. A valve guide cylinder is provided on a part of the outer periphery of a cylindrical body, and a valve plate inserted in the valve guide cylinder is moved toward the inside of the body to close a flow path of the body. In the sluice valve, a seal groove is provided on the inner peripheral surface of the body along the outer periphery of the closed valve plate, and the outer peripheral seal portion fitted in the seal groove is disposed inside the valve guide cylinder at both ends thereof. An annular seal member provided with a column portion is formed of an elastic body, and protrusions engaging with inner circumferences of both ends of the seal member are provided on both sides of the opening of the seal groove and the inner surface of the valve guide cylinder. Forming a through hole through which the valve plate is inserted, and forming a fluid passage communicating with each other on the outer periphery of the pair of face seal parts and the outer peripheral seal part provided on both sides of the through hole, and Is a partition with a supply / discharge hole that communicates with the fluid passage. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61097552A JPH0765687B2 (en) | 1986-04-24 | 1986-04-24 | Gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61097552A JPH0765687B2 (en) | 1986-04-24 | 1986-04-24 | Gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62251578A JPS62251578A (en) | 1987-11-02 |
| JPH0765687B2 true JPH0765687B2 (en) | 1995-07-19 |
Family
ID=14195404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61097552A Expired - Fee Related JPH0765687B2 (en) | 1986-04-24 | 1986-04-24 | Gate valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765687B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002181224A (en) * | 2000-12-14 | 2002-06-26 | Mitsui Mining Co Ltd | Discharge valve |
| JP2002317876A (en) * | 2001-04-20 | 2002-10-31 | Nippon Soda Co Ltd | Fluid valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53155728U (en) * | 1977-05-13 | 1978-12-07 | ||
| JPS57112168U (en) * | 1980-12-29 | 1982-07-10 | ||
| JPS57193460U (en) * | 1981-06-02 | 1982-12-08 | ||
| JPS5838074U (en) * | 1981-09-09 | 1983-03-12 | 東鉄工株式会社 | valve seat |
-
1986
- 1986-04-24 JP JP61097552A patent/JPH0765687B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62251578A (en) | 1987-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3840048A (en) | Seal construction | |
| US3916950A (en) | Seal construction | |
| CA1125727A (en) | Metal-to-metal seat hub seals | |
| US4688757A (en) | Soft seat Y pattern globe valve | |
| US4363465A (en) | Extreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal seal | |
| US2194261A (en) | Gate valve, seat, and packing | |
| US8550117B2 (en) | Seal assembly for a fluid pressure control device | |
| US6851658B2 (en) | Control valve trim and bore seal | |
| US3889925A (en) | Gate valve and seal | |
| ES2229630T3 (en) | SLIDING ASSEMBLY FOR A DOUBLE DISK SLIDING VALVE. | |
| US4136710A (en) | Floating seat structure for gate valves | |
| US5988605A (en) | Adjustable length gas spring | |
| US2427439A (en) | Valve | |
| US3033227A (en) | Ball valve | |
| KR19980701813A (en) | Valve assembly with improved valve seat | |
| US3184213A (en) | Seat for top entry ball valve | |
| CA2594083A1 (en) | Bi-directional knife gate valve apparatus and method | |
| KR950003668A (en) | Rotary Valves and Butterfly Valves | |
| JPH0765687B2 (en) | Gate valve | |
| US4146209A (en) | Gate valve | |
| KR900700808A (en) | Processes and devices for protecting and supporting sealing of valves | |
| US3392743A (en) | Lubricated ball valve with flexible metal sealing lips | |
| US4314688A (en) | Gate valve | |
| CN109268522A (en) | A kind of gate valve flow control mechanism with linkage translation squeeze function | |
| US3290002A (en) | Flow control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |