JPH0448385Y2 - - Google Patents
Info
- Publication number
- JPH0448385Y2 JPH0448385Y2 JP1986124591U JP12459186U JPH0448385Y2 JP H0448385 Y2 JPH0448385 Y2 JP H0448385Y2 JP 1986124591 U JP1986124591 U JP 1986124591U JP 12459186 U JP12459186 U JP 12459186U JP H0448385 Y2 JPH0448385 Y2 JP H0448385Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- membrane
- valve body
- valve stem
- fitted
- 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
Links
- 239000012528 membrane Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 description 8
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Fluid-Driven Valves (AREA)
Description
【考案の詳細な説明】
〔考案の目的〕
（産業上の利用分野）
本考案はダイヤフラムバルブにかかり、小口径
配管に適用して好適なダイヤフラムバルブに関す
る。[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a diaphragm valve, and relates to a diaphragm valve suitable for application to small diameter piping.
（従来の技術）
例えば、薬品関係の製造ラインにおけるサンプ
リングライン等にあつては、配管中の流そを制御
するダイヤフラムバルブが用いられる。(Prior Art) For example, in sampling lines and the like in chemical-related manufacturing lines, diaphragm valves are used to control flow in piping.
従来の上記ダイヤフラムバルブは、第３図に縦
断面を示すように、バルブ本体１に昇降自在に挿
通された弁棒２の下端に凸球面状を有する弁体３
を有し、この弁体３の凸球面にそつて数mm厚のゴ
ム板４を基材としその表面に0.8mm厚程度の弗素
系樹脂膜５がラミネートされた膜体６がそわさ
れ、この膜体６の周囲がバルブ本体１とカバー７
との間に挟着されて支持され、膜体６の中央部下
面がバルブ本体１の流路中に***するシート部８
の頂部に密接することによりバルブ本体１内の流
路が閉鎖されて閉弁状態となり、弁棒２の引上げ
により膜体６が第３図に鎖線で示す反転状態とな
つて開弁される構造となつている。 The conventional diaphragm valve has a valve body 3 having a convex spherical shape at the lower end of a valve rod 2 inserted into a valve body 1 so as to be able to rise and fall freely, as shown in a longitudinal section in FIG.
Along the convex spherical surface of the valve body 3, a membrane body 6, which is made of a rubber plate 4 several mm thick as a base material and a fluorine-based resin membrane 5 about 0.8 mm thick is laminated on the surface, is bent. The membrane body 6 is surrounded by the valve body 1 and the cover 7.
a seat portion 8 which is sandwiched and supported between the membrane body 6 and the central lower surface of the membrane body 6 protrudes into the flow path of the valve body 1;
By coming into close contact with the top of the valve body 1, the flow path in the valve body 1 is closed and the valve is in a closed state, and when the valve stem 2 is pulled up, the membrane body 6 is turned into an inverted state as shown by the chain line in FIG. 3, and the valve is opened. It is becoming.
（考案が解決しようとする問題点）
しかるに上記従来のダイヤフラムバルブでは、
閉弁時に膜体６とシート部８とが平面的に密接す
ることによりシールされかつ膜体６の広い面積の
領域が流体に面することになるので受圧面積が大
きく、そのため膜体６のシート部８に当つている
部分で膜体６に変形を生じさせ、膜体６がシート
部８から離間しやすくなつてシール性能が損われ
るという欠点があつた。(Problem that the invention attempts to solve) However, with the above conventional diaphragm valve,
When the valve is closed, the membrane body 6 and the seat portion 8 come into close contact with each other in a planar manner, creating a seal, and a large area of the membrane body 6 faces the fluid, so the pressure receiving area is large. This has the disadvantage that the membrane body 6 is deformed at the portion that contacts the portion 8, and the membrane body 6 tends to separate from the sheet portion 8, thereby impairing the sealing performance.
また、ゴム板４と樹脂膜５とが万一剥離した場
合、薬液がゴム板４と樹脂膜５との間に侵入し、
腐蝕（クロスコンタミネーシヨン）が発生するこ
とがある。これはバルブを分解してみても目視に
よつてはその腐蝕状況が判断できないため非常に
危険である。そしてゴム板４と弗素系樹脂膜５と
は熱膨張率が異なるため剥離が生じやすく、これ
らに起因する漏れが発生しやすいという問題があ
つた。 Furthermore, in the event that the rubber plate 4 and the resin film 5 are separated, the chemical solution may enter between the rubber plate 4 and the resin film 5.
Corrosion (cross contamination) may occur. This is extremely dangerous because the corrosion status cannot be determined visually even if the valve is disassembled. Furthermore, since the rubber plate 4 and the fluororesin film 5 have different coefficients of thermal expansion, they tend to peel off, and this causes a problem in that leaks tend to occur.
本考案は上記従来技術の問題点に着目し、これ
を改善することを目的としてなされたもので、バ
ルブとしてのシール性を高め、且つ弁体の腐蝕の
おそれがなく、しかも目視により液漏れ状況を把
握することのできるダイヤフラムバルブを提供す
ることにある。 The present invention was developed with the aim of improving the above-mentioned problems of the conventional technology.It improves the sealing performance of the valve, eliminates the risk of corrosion of the valve body, and allows visual inspection of liquid leakage. Our goal is to provide a diaphragm valve that can handle the
（問題点を解決するための手段）
上記目的を達成するため、本考案によるダイヤ
フラムバルブは、流路を有するバルブ基体の嵌合
部に嵌合されて一体化され弁棒を昇降自在に支持
する弁棒保持部材を備えたバルブ本体と、弗素系
樹脂等により弁棒嵌合部の下端に膜部が一体に形
成された弁体とを設け、この弁体は前記膜部の中
央部下面に突設され前記バルブ基体に形成された
凹状シート部に密嵌し得る球面ないしは円錐面を
有する突状弁部と、前記弁体の弁棒嵌合部から膜
部に連なる部分の外周部を小径にくびらせて形成
された凹部とを有し、前記膜部の外周部を弁棒保
持部材の外周に形成された環状溝に折返して嵌合
し、この折返し部外面をバルブ基体の弁棒保持部
材嵌合部で押圧固定したことを特徴とするもので
ある。
(Means for Solving the Problems) In order to achieve the above object, the diaphragm valve according to the present invention is fitted into a fitting part of a valve base having a flow path to be integrated, and supports a valve stem so as to be able to move up and down. A valve body is provided with a valve stem holding member, and a valve body is integrally formed with a membrane portion at the lower end of the valve stem fitting portion made of fluororesin or the like, and this valve body is provided on the lower surface of the center of the membrane portion. A protruding valve portion having a spherical or conical surface that protrudes and can be tightly fitted into a concave seat portion formed on the valve base, and a portion of the valve body that extends from the valve stem fitting portion to the membrane portion has a small diameter. The outer periphery of the membrane part is folded back and fitted into an annular groove formed on the outer periphery of the valve stem holding member, and the outer surface of the folded part is inserted into the valve stem of the valve base. It is characterized in that it is fixed by pressing at the holding member fitting portion.
（作用）
上記の構成により、弁体を降下させると膜面中
央部の突状弁部がバルブ基体のシート部に嵌合し
て閉弁状態となり、弁体を引上げれば、突状弁部
がシート部から脱出して流路をひらく。閉弁時に
おいては弁体の突状弁部がバルブ基体の凹状シー
トに密嵌して閉弁状態を保つので、流体圧はこの
突状弁部の側面に加わることにより、膜部をシー
トから剥す方法に直接作用しないため膜部の離反
が生じにくくなつてシート性がよく、かつ弁体と
膜体とが弗素系樹脂材により一体形成されている
の膜面の剥離がないとともに、万一液漏れがあつ
ても弁体の凹部内に溜つているのでバルブを分解
すれば目視により直ちに液漏れを把握することが
できる。(Function) With the above configuration, when the valve body is lowered, the protruding valve part at the center of the membrane surface fits into the seat part of the valve base, and the valve is closed, and when the valve body is pulled up, the protruding valve part escapes from the seat part and opens a flow path. When the valve is closed, the protruding valve part of the valve body tightly fits into the concave seat of the valve base to maintain the closed state, so fluid pressure is applied to the side surface of the protruding valve part to separate the membrane part from the seat. Since it does not affect the peeling method directly, the membrane part is less likely to separate, resulting in good sheeting properties.Also, since the valve body and membrane body are integrally formed from a fluorine-based resin material, the membrane surface does not peel off, and even if there is a problem, Even if liquid leaks, it remains in the recess of the valve body, so if the valve is disassembled, the leak can be visually detected immediately.
（実施例）
以下、本考案を第１図及び第２図に示す実施例
を参照して説明する。(Example) Hereinafter, the present invention will be explained with reference to an example shown in FIGS. 1 and 2.
第１図は手動開閉式ダイヤフラムバルブに本考
案を適用した場合の閉弁状態における半部を断面
として示すもので、バルブ本体１０は、配管に接
続される流路１１を有するバルブ基体１２と、こ
のバルブ基体１２の弁体挿入用開口部に嵌合され
る弁棒保持部材１３と、このバルブ基体１２と弁
棒保持部材１３との外側部を締結するリング部材
１４とで構成されている。 FIG. 1 shows a half section in a closed state when the present invention is applied to a manually opened/closed diaphragm valve, and the valve body 10 includes a valve base 12 having a flow path 11 connected to piping, It is comprised of a valve stem holding member 13 that fits into the valve body insertion opening of the valve base 12, and a ring member 14 that fastens the outer parts of the valve base 12 and the valve stem holding member 13.
前記弁棒保持部材１３には弁棒１５が軸方向摺
動自在に挿通され、この弁棒１５の上端に止ネジ
１６により回転可能に結合されたハンドル１７の
筒部１７Ａが弁棒保持部材１３の外周に螺合され
ている。 A valve stem 15 is inserted into the valve stem holding member 13 so as to be freely slidable in the axial direction. is screwed onto the outer periphery of the
前記弁棒１５の下部には弁体１８が嵌合固定さ
れている。 A valve body 18 is fitted and fixed to the lower part of the valve stem 15.
この弁体１８は、弗素樹脂乃至はこれに類する
材料により形成されるもので、弁棒１５の下端に
外嵌される軸筒部１９と、この軸筒部１９の下端
に一体に連設されて拡張された膜部２０とからな
り、膜部２０の下面中央部に球面乃至円錐面を有
して突状弁部２１が突設され、この突状弁部２１
は前記バルブ基体１２の流路１１の入口部に形成
された球面乃至は円錐形の凹部からなるシート部
２２に密嵌されるようになつている。そして前記
軸筒部１９と膜部２０とが連なる部分の外周はく
びれ状に凹曲されて凹部２３が形成されている。 The valve body 18 is made of fluororesin or a similar material, and is integrally connected to a cylindrical shaft portion 19 that is fitted onto the lower end of the valve stem 15 and the lower end of the cylindrical shaft portion 19. A projecting valve part 21 having a spherical or conical surface is protruded from the center of the lower surface of the film part 20.
is adapted to be tightly fitted into a seat portion 22 consisting of a spherical or conical recess formed at the inlet of the flow path 11 of the valve base 12. The outer periphery of the portion where the shaft cylindrical portion 19 and the membrane portion 20 are connected is concavely curved to form a concave portion 23.
前記膜部２０の外周部は、前記弁棒保持部材１
３の外周に形成された断面コ字状の環状溝２４内
に折返して挿入され、その折曲部２０Ａの外側面
は前記バルブ基体１２の嵌合部１２Ａの内周面に
より押えられ、抜止めされている。なお、前記環
状溝２４の奥側にゴム等の弾性体２５を内装して
おき、これに膜部２０の周縁端部を衝当てるよう
にすることにより膜部２０の保持を一層確実とす
ると同時に、該部から液漏れを確実に防ぐことが
できる。 The outer peripheral part of the membrane part 20 is connected to the valve stem holding member 1.
The outer surface of the bent portion 20A is pressed by the inner peripheral surface of the fitting portion 12A of the valve base 12 to prevent it from coming out. has been done. An elastic body 25 made of rubber or the like is installed inside the annular groove 24, and the peripheral end of the membrane 20 is brought into contact with this to ensure that the membrane 20 is held more securely. , it is possible to reliably prevent liquid leakage from this part.
つぎに上記実施例の作用を説明する。 Next, the operation of the above embodiment will be explained.
第１図示の状態からハンドル１７をゆるめる方
向に回動すると、弁棒１５が引上げられ、弁体１
８の突状弁部２１はシート部２２から離間して開
弁状態となる。逆にハンドル１７を締込む方向に
回動すれば、弁棒１５が下降し、これに嵌着され
ている弁体１８が押し下げられてその突状弁部２
１がシート部２２に嵌合密着して閉弁状態とな
る。この閉弁状態においては、凹状のシート部２
２に密嵌している突状弁部２１の側面に流体圧力
が加わるので、アングルバルブと同様に機能して
突状弁部２１がシート部２２から離反することが
ない。仮に膜部２０の周辺から液漏れが生じた場
合には、弁体１８の膜部２０上面部に形成されて
いる凹部２３内に液が溜るので、外部に流出する
ことがなく、バルブの分解時に液体の漏出を速く
発見することができる。 When the handle 17 is rotated in the direction of loosening it from the state shown in the first figure, the valve stem 15 is pulled up and the valve body 1
The protruding valve portion 21 of No. 8 is separated from the seat portion 22 and becomes in an open state. Conversely, when the handle 17 is rotated in the direction of tightening, the valve stem 15 is lowered, and the valve body 18 fitted on the stem is pushed down and the protruding valve portion 2 is pushed down.
1 is tightly fitted into the seat portion 22, and the valve is in a closed state. In this valve closed state, the concave seat portion 2
Since fluid pressure is applied to the side surface of the protruding valve part 21 that is tightly fitted into the valve part 2, the protruding valve part 21 functions similarly to an angle valve, and the protruding valve part 21 does not separate from the seat part 22. If liquid leaks from around the membrane part 20, the liquid will collect in the recess 23 formed on the upper surface of the membrane part 20 of the valve body 18, so it will not leak outside and the valve will not be disassembled. Sometimes liquid leaks can be detected quickly.
第２図は圧力エアで自動的に作動させる自動開
閉式ダイヤフラムバルブに本考案を適用した場合
の閉弁時における半部を断面として示すもので、
弁棒１５の上端部にピストン２６がナツト２７に
より固着され、このピストン２６はバルブ本体１
０の上部に接続されたシリンダ部２８内にシール
リング２９を介して密接摺動自在に内挿され、常
時は圧縮バネ３０により弁棒１５を閉弁方向に加
圧している。 Figure 2 shows a cross section of half of the valve when it is closed when the present invention is applied to an automatic opening/closing type diaphragm valve that is automatically operated by pressurized air.
A piston 26 is fixed to the upper end of the valve stem 15 with a nut 27, and this piston 26 is attached to the valve body 1.
The valve rod 15 is tightly slidably inserted into a cylinder portion 28 connected to the upper part of the valve 0 through a seal ring 29, and the valve rod 15 is normally pressurized in the valve closing direction by a compression spring 30.
前記シリンダ部２８の下部には圧力エア供給口
３１が、同上部には排気口３２が設けられてお
り、この圧力エア供給口３１には図示しない圧力
エア供給源が接続されるものである。 A pressure air supply port 31 is provided at the bottom of the cylinder portion 28, and an exhaust port 32 is provided at the top thereof, and a pressure air supply source (not shown) is connected to the pressure air supply port 31.
これによれば、圧力エアの給排により弁棒１５
を自動的に昇降させ、高所配管の場合などにおけ
る遠隔操作、あるいは他の信号により自動開閉さ
せるダイヤフラムバルブに適用して好適である。 According to this, by supplying and discharging pressurized air, the valve rod 15
It is suitable for application to a diaphragm valve that automatically raises and lowers the valve and automatically opens and closes by remote control in the case of high-place piping, or by other signals.
他の構成は、第１図示の実施例と同様であるか
ら、対応する部分に同一符号を付して説明を省略
する。 Since the other configurations are the same as those of the embodiment shown in the first figure, corresponding parts are denoted by the same reference numerals and description thereof will be omitted.
〔考案の効果〕
以上説明したように、本考案によるダイヤフラ
ムバルブは、流路を有するバルブ基体の嵌合部に
嵌合されて一体化され弁棒を昇降自在に支持する
弁棒保持部材を備えたバルブ本体と、弗素系樹脂
等により弁棒嵌合部の下端に膜部が一体に形成さ
れた弁体とを設け、この弁体は前記膜部の中央部
下面に突設され前記バルブ基体に形成された凹状
シート部に密嵌し得る球面ないしは円錐面を有す
る突状弁部と、前記弁体の弁棒嵌合部から膜部に
連なる部分の外周部を小径にくびらせて形成され
た凹部とを有し、前記膜部の外周部を弁棒保持部
材の外周に形成された環状溝に折返して嵌合し、
この折返し部外面をバルブ基体の弁棒保持部材嵌
合部で押圧固定した構成としたので、流体圧によ
つてダイヤフラムの変位がなく、シール機能を高
めることができるとともに、膜部は弁体に一体構
成であるから膜体剥離による液体の浸蝕がなく、
かつ液漏れがあつても弁体の凹部内に貯留される
ので安全であるなどの種々の効果がある。[Effects of the invention] As explained above, the diaphragm valve according to the invention includes a valve stem holding member that is fitted and integrated into the fitting part of the valve base having a flow path and supports the valve stem so as to be able to move up and down. A valve body is provided, and a valve body is integrally formed with a membrane part at the lower end of a valve stem fitting part made of fluorine resin or the like, and this valve body is provided protruding from the lower surface of the center of the membrane part and is connected to the valve base. A protruding valve portion having a spherical or conical surface that can be tightly fitted into a concave seat portion formed in the valve body, and a constricted outer peripheral portion of a portion of the valve body that extends from the valve stem fitting portion to the membrane portion to a small diameter. and a recessed portion, and the outer circumferential portion of the membrane portion is folded back and fitted into an annular groove formed on the outer circumference of the valve stem holding member,
Since the outer surface of this folded part is pressed and fixed by the fitting part of the valve stem holding member of the valve base, the diaphragm is not displaced by fluid pressure, and the sealing function can be improved, and the membrane part is attached to the valve body. Since it is a one-piece structure, there is no liquid erosion due to membrane peeling.
Moreover, even if liquid leaks, it is stored in the recess of the valve body, so it has various effects such as safety.
第１図は本考案によるダイヤフラムバルブの一
実施例を示す閉弁状態時における半部を断面とし
た正面図、第２図は同自動開閉バルブとした場合
の一実施例を示す閉弁状態時における半部を断面
とした正面図、第３図は従来のダイヤフラムバル
ブの縦断面図である。
１，１０……バルブ本体、２，１５……弁棒、
３，１８……弁体、６，２０……膜部、８，２２
……シート部、１２……バルブ基体、１３……弁
棒保持部材、１７……ハンドル、２１……突状弁
部、２３……凹部、２４……環状溝、２５……弾
性体、２６……ピストン。
Fig. 1 is a front view with a half cross section showing an embodiment of the diaphragm valve according to the present invention in the closed state, and Fig. 2 is a front view showing an embodiment of the automatic opening/closing valve in the closed state. FIG. 3 is a front view with a half section taken in section, and FIG. 3 is a longitudinal cross-sectional view of a conventional diaphragm valve. 1, 10... Valve body, 2, 15... Valve stem,
3, 18... Valve body, 6, 20... Membrane part, 8, 22
... Seat part, 12 ... Valve base, 13 ... Valve stem holding member, 17 ... Handle, 21 ... Protruding valve part, 23 ... Recessed part, 24 ... Annular groove, 25 ... Elastic body, 26 ……piston.
Claims (1)
一体化され弁棒を昇降自在に支持する弁棒保持部
材を備えたバルブ本体と、弗素系樹脂等により弁
棒嵌合部の下端に膜部が一体に形成された弁体と
を設け、この弁体は前記膜部の中央部下面に突設
され前記バルブ基体に形成された凹状シート部に
密嵌し得る球面ないしは円錐面を有する突状弁部
と、前記弁体の弁棒嵌合部から膜部に連なる部分
の外周部を小径にくびらせて形成された凹部とを
有し、前記膜部の外周部を弁棒保持部材の外周に
形成された環状溝に折返して嵌合し、この折返し
部外面をバルブ基体の弁棒保持部材嵌合部で押圧
固定したことを特徴とするダイヤフラムバルブ。 The valve body includes a valve stem holding member that is fitted and integrated into the fitting part of the valve base having a flow path and supports the valve stem so as to be able to move up and down. A valve body is provided with a membrane portion integrally formed, and the valve body has a spherical or conical surface that protrudes from the lower surface of the center of the membrane portion and can be tightly fitted into a concave seat portion formed on the valve base. It has a protruding valve part and a concave part formed by constricting the outer circumferential part of the part of the valve body connected from the valve stem fitting part to the membrane part to a small diameter, and the outer circumferential part of the membrane part holds the valve stem. A diaphragm valve characterized in that the member is folded back and fitted into an annular groove formed on the outer periphery of the member, and the outer surface of the folded portion is pressed and fixed by a valve stem holding member fitting portion of a valve base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986124591U JPH0448385Y2 (en) | 1986-08-15 | 1986-08-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986124591U JPH0448385Y2 (en) | 1986-08-15 | 1986-08-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6330674U JPS6330674U (en) | 1988-02-29 |
| JPH0448385Y2 true JPH0448385Y2 (en) | 1992-11-13 |
Family
ID=31016748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986124591U Expired JPH0448385Y2 (en) | 1986-08-15 | 1986-08-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448385Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188869A (en) * | 1986-02-14 | 1987-08-18 | Kubota Ltd | Assembly of synthetic resin valve |
-
1986
- 1986-08-15 JP JP1986124591U patent/JPH0448385Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188869A (en) * | 1986-02-14 | 1987-08-18 | Kubota Ltd | Assembly of synthetic resin valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6330674U (en) | 1988-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11118048A (en) | Diaphragm valve with leak detection | |
| US6883780B2 (en) | Sanitary diaphragm valve | |
| KR20010006969A (en) | High-efficiency poppet and seat assembly | |
| KR960705167A (en) | A MIXER VALVE HAVING A BALL VALVE ELEMENT AND UPPER SEALING GASKET | |
| US5722638A (en) | Valve with means to block relative rotation of parts during assembly | |
| US3906999A (en) | Liquid valve | |
| JPH0448385Y2 (en) | ||
| JP3607690B2 (en) | valve | |
| JPS643897Y2 (en) | ||
| NO811373L (en) | FLUIDUMSTROEMSTYREVENTIL. | |
| JPS632708Y2 (en) | ||
| JPH0519645Y2 (en) | ||
| JPH0313014Y2 (en) | ||
| JPH0221082A (en) | Hot water solenoid valve | |
| JPH0247814Y2 (en) | ||
| JPS6323659Y2 (en) | ||
| JPH09210226A (en) | Opening/closing valve | |
| JPS6214467Y2 (en) | ||
| JPH0234526Y2 (en) | ||
| JPS6128929Y2 (en) | ||
| KR101975897B1 (en) | Ball valve having enhanced sealing performance | |
| JP3989062B2 (en) | Check valve cartridge | |
| JPS6017573Y2 (en) | butterfly valve | |
| JPH07301348A (en) | Angle-shaped ball valve | |
| JP3122123B2 (en) | Sealed structure of valve |