JPS58187663A - Valve - Google Patents
ValveInfo
- Publication number
- JPS58187663A JPS58187663A JP7030182A JP7030182A JPS58187663A JP S58187663 A JPS58187663 A JP S58187663A JP 7030182 A JP7030182 A JP 7030182A JP 7030182 A JP7030182 A JP 7030182A JP S58187663 A JPS58187663 A JP S58187663A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- alloy
- valve body
- resistance
- 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.)
- Pending
Links
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010955 niobium Substances 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 25
- 239000000956 alloy Substances 0.000 abstract description 25
- 230000003628 erosive effect Effects 0.000 abstract description 19
- 239000010941 cobalt Substances 0.000 abstract description 6
- 229910017052 cobalt Inorganic materials 0.000 abstract description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 3
- 229910017262 Mo—B Inorganic materials 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910001429 cobalt ion Inorganic materials 0.000 description 2
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910019590 Cr-N Inorganic materials 0.000 description 1
- 229910019588 Cr—N Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/04—Arrangements for preventing erosion, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は耐摩耗性および耐エロージヨン性に優れた弁に
関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a valve with excellent wear resistance and erosion resistance.
弁は普通、弁箱、弁体、弁座、弁棒、ボンネット、ハン
ドル等から成シ立ってお〉、流れの開閉および調節は、
弁箱内において弁体が作動し、弁箱内の流路に設けられ
た弁座に弁体の弁座が離接して流路を開閉することによ
シ行われる。従って。A valve usually consists of a valve body, a valve body, a valve seat, a valve stem, a bonnet, a handle, etc., and the opening, closing, and regulation of flow are
This is accomplished by operating a valve body within the valve box, and opening and closing the flow path by bringing the valve seat of the valve body into and out of contact with a valve seat provided in a flow path within the valve box. Therefore.
肉汁塵の表面は機械的接触を繰り返し受け、さらに流体
の衝突によるエロージョンを受けることから。The surface of meat juice dust is subjected to repeated mechanical contact and further undergoes erosion due to fluid collisions.
Ｃｏ−Ｃｒ−Ｎ１−Ｗ系合金いわゆるステライトが肉盛
り溶接されて広く用いられてきたが、コバルト資源の枯
渇対策、化学プラントの反応制御、原子カプラントの安
全性向上等の観点から、コバルト粒子またはコバルトイ
オンの放出低減を目的として、Ｎ１を基体とした耐摩耗
・耐エロージヨン合金を弁箱の弁座および／または弁体
の弁座に使用した弁が開発されている。しかしながら、
Ｎｉ基耐摩耗・耐エロージヨン合金は、従来のＣｏ基
合金に比べて耐摩耗性および耐エロージヨン性が劣って
おり、弁としての性能が十分ではない問題点を有してい
る。Co-Cr-N1-W alloy, so-called stellite, has been widely used by overlay welding, but from the viewpoint of measures against depletion of cobalt resources, reaction control in chemical plants, and improvement of safety in atomic couplants, cobalt particles or In order to reduce the release of cobalt ions, valves have been developed in which a wear-resistant and erosion-resistant alloy based on N1 is used for the valve seat of the valve body and/or the valve seat of the valve body. however,
Ni-based wear and erosion-resistant alloys have inferior wear resistance and erosion resistance compared to conventional Co-based alloys, and have the problem of insufficient performance as valves.
本発明は、上記した問題点全解消する九めになされたも
ので、弁箱の弁座および／ｌたは弁体の弁座にＮｉ −
Ｃｒ −Ｎｂ −Ｍｏ −Ｂ系合金を使用することによ
り、各種プラントにおいてコバルト粒子ｔたはコバルト
イオンの放出が実質的に皆無であリ、かつ、耐摩耗性お
よび耐エロージヨン性に優れた弁ｔ−提供することを目
的とするものである。The present invention has been made to solve all the above-mentioned problems, and the valve seat of the valve body and/or the valve seat of the valve body are coated with Ni-
By using the Cr-Nb-Mo-B alloy, there is virtually no release of cobalt particles or cobalt ions in various plants, and the valve has excellent wear resistance and erosion resistance. - It is intended to provide.
本発明の弁は、弁箱および／ｉたは弁体の弁座の少なく
とも表面が、クロム（Ｃｒ ） １０重４５重量−，ニ
オブ（Ｎｂ ） ３〜１５重量−、モリブデン（Ｍｏ
） ２０重１に一以下、ホウ素（Ｂ）０．０１〜２．０
重を饅および残部がニッケル（Ｎｌ）から成る合金であ
ることｔ−％徴とするものである。In the valve of the present invention, at least the surface of the valve body and the valve seat of the valve body is made of chromium (Cr) 10 to 45 weight, niobium (Nb) 3 to 15 weight, molybdenum (Mo
) Boron (B) 0.01 to 2.0, less than 1 in 20 parts
The weight is t-% indicating that the alloy is made of rice and the balance is nickel (Nl).
以下において２本発明をさらに詳しく説明する。The two inventions will be explained in more detail below.
本発明の弁は、弁箱内に設けられた弁座に弁体の弁座が
ｍ接して流路を開閉するものであればいかなるものでも
よく９例えば、玉形弁、仕切弁。The valve of the present invention may be of any type as long as the valve seat of the valve body contacts the valve seat provided in the valve box to open and close a flow path.9For example, a globe valve or a gate valve may be used.
スウィング式逆止め弁等のものが適合する。かかる弁に
、上記組成から成る合金を弁箱の弁座および／または弁
体の弁座に使用する。Swing type check valves, etc. are suitable. In such a valve, an alloy having the above composition is used for the valve seat of the valve body and/or the valve seat of the valve body.
本発明の弁に使用される弁座の合金組成の限定理由につ
いて説明する。まずＣｒは耐食性および合金の素地全強
化する九めに必畳な成分で、その組成比が１０−未満で
は効果が不十分であり、また７９ｒ費の耐摩耗性が得ら
れない。The reasons for limiting the alloy composition of the valve seat used in the valve of the present invention will be explained. First of all, Cr is the ninth essential component that completely strengthens the corrosion resistance and the alloy matrix, and if its composition ratio is less than 10-1, the effect is insufficient and the wear resistance of 79R cannot be obtained.
ＮｂはＮｉと反応して合金の素地の強化と耐摩耗性およ
び耐エロージヨン性の向上に寄与する成分であるが、そ
の量が３チ未満では効果が不十分でまた１５チを超える
と靭性の低下がみられ材料の機械的強度が損なわれるか
らである。Ｍ・は耐食性の向上と合金素地音強化し耐摩
耗性および耐エロージヨン性の向上に寄与するものであ
るが、２０儂を超えると合金の靭性の低下がみられるか
らである。Ｂｉｊ溶融溶融湯流れ性の同上と合金素地全
強化し耐摩耗性および耐エロージヨン性の向上に寄与す
るものであるが、その電が０．０１１未満では効果が不
十分で、また２％を超えると合金の靭性の低下がみられ
るからである。Nb is a component that reacts with Ni and contributes to strengthening the alloy base and improving wear resistance and erosion resistance. However, if the amount is less than 3 inches, the effect is insufficient, and if it exceeds 15 inches, the toughness deteriorates. This is because the mechanical strength of the material is impaired. M. improves corrosion resistance and strengthens the alloy's base sound, contributing to improvements in wear resistance and erosion resistance, but if it exceeds 20 degrees, the toughness of the alloy decreases. It contributes to improving wear resistance and erosion resistance by completely strengthening the alloy base and improving the flowability of Bij molten metal, but if the electric current is less than 0.011, the effect is insufficient, and if it exceeds 2%. This is because the toughness of the alloy decreases.
しかして本発明に係る弁の弁座用合金は、 Ｎｂの一部
ｔタンタル（Ｔ＆ ）で置換してもよい。またＮｌの一
部を鉄（Ｆ・）で置換すること、 Ｍｅの一部をタング
ステン（Ｗ）に置換することもできる。Thus, in the valve seat alloy of the valve according to the present invention, a portion of Nb may be replaced with tantalum (T&). Further, part of Nl can be replaced with iron (F.), and part of Me can be replaced with tungsten (W).
さらに溶解時に添加する脱酸、脱窒剤としてのマンガン
（Ｍｎ ）やけい素（Ｓｌ）等【含んでいても差支えな
い。In addition, manganese (Mn) and silicon (Sl) as deoxidizing and denitrifying agents added during melting may be included.
まず１表−１に示す組成（重量比）の素材？ｔ％周波真
空誘導溶解炉を用いて溶解鋳造し９得られた３植類の鋳
造品から試験片を切り出して特性評価試験全行なった。First, is the material with the composition (weight ratio) shown in Table 1? Test pieces were cut out from the three types of castings obtained by melting and casting using a t% frequency vacuum induction melting furnace, and all characteristic evaluation tests were conducted.
その結果を表−１に示す。The results are shown in Table-1.
同時に比較例として、Ｎ１−Ｃｒ−Ｂ糸自溶合金（試料
４ Ｌ Ｎｌ −Ｃｒ −Ｍｏ−８重糸合金（試料５）
谷の５種類についても、同様に試験を行ない、その結果
を表−１に併せて示した。At the same time, as comparative examples, N1-Cr-B thread self-fluxing alloy (sample 4), Nl-Cr-Mo-8 heavy thread alloy (sample 5)
Similar tests were conducted for the five types of valleys, and the results are also shown in Table 1.
特性評価試験としては、超音波振動方式によるキャビテ
ーションエロージョン試験およびアムスラー型による摩
耗試験を行なった。キャビテーションエロージョン試験
は学振法に準じて３時間行ない、また、アムスラー型に
よる摩耗試験は試験荷重３０ｋｐ、摺動摩耗距離１００
０ｍ、潤滑剤として水（１匡／秒）を使用して行なった
。なお１表−１における損耗ｔは、試験による試験片の
重量減少（〜）を試験時間（分）と密度＜ｔｐｙｅｓ’
）ｉで除し比値にＩ Ｘ １０’を乗したもので時間当
シの体積減少量を示すものであり、また摩耗量は、試験
による試験片の重量減少！ （”ｌ／ ） ｔ−示すも
のである。As a characteristic evaluation test, a cavitation erosion test using an ultrasonic vibration method and a wear test using an Amsler type were performed. The cavitation erosion test was conducted for 3 hours according to the Jakushin Law, and the wear test using the Amsler type was carried out at a test load of 30 kp and a sliding wear distance of 100.
0 m, using water (1 square/second) as a lubricant. In addition, the wear t in Table 1 is defined as the weight loss (~) of the test piece due to the test, the test time (minutes) and the density <tpyes'
) The ratio value divided by i is multiplied by I x 10', which indicates the amount of volume reduction over time, and the amount of wear is the weight loss of the test piece due to the test! ("l/) t-indicates.
表−−１
これからは９本発明の弁に使用されるＮｉ −Ｃｒ−Ｎ
ｂ −Ｎｏ −Ｂ系合金が、比較例のものに比べて。Table--1 From now on, 9 Ni-Cr-N used in the valve of the present invention
b -No -B alloy compared to that of the comparative example.
摩耗量が看しく少なく、かつ損耗量も少ないことがわか
る。It can be seen that the amount of wear and tear is noticeably small.
上記実施例の試料１０合金を、弁箱お↓び弁体の各弁座
に肉盛り＃接して、ＷＪ１図に示す呼び径ｌＯＯ■の仕
切弁ｔ−製作し、開閉動作後の弁の気密性全試験し友。The sample 10 alloy of the above example was put in contact with each valve seat of the valve box and valve body to make a gate valve with a nominal diameter lOO■ as shown in Figure WJ1, and the valve was airtight after opening and closing operations. A friend who has undergone a complete sexual examination.
図においてｌは弁箱、２は弁箱の９Ｐｍ、３は弁体、４
は弁体の弁座、５は弁体。In the figure, l is the valve box, 2 is 9Pm of the valve box, 3 is the valve body, and 4
is the valve seat of the valve body, and 5 is the valve body.
６はボンネット、７はハンドルを示す。また比較例とし
て、上記比較例の試料４０合金を用いて同一構造の仕切
弁を製作し、同一条件下にて試験し次。その結果ｉｒ表
−２に併せて示す。6 indicates a bonnet, and 7 indicates a handle. As a comparative example, a gate valve of the same structure was manufactured using the sample 40 alloy of the comparative example, and tested under the same conditions. The results are also shown in IR Table-2.
なお、開閉動作は９面圧２ｖ１２の負荷状態で６００回
行ない、気密性試験は、室温水および３００℃高圧水を
通水し、出口側の漏れを測定した。The opening/closing operation was performed 600 times under a load of 9 surface pressures of 2v12, and the airtightness test was performed by passing room temperature water and high pressure water at 300° C. and measuring leakage on the outlet side.
表−２
弁は、比較例のものに比べて気密性が高く、耐摩耗性に
優れていることが確認された。Table 2 It was confirmed that the valves had higher airtightness and superior wear resistance than those of the comparative example.
また、上記実施例の試料３の合金を、弁箱および弁体の
各弁座に肉盛り溶接して、第２図に示す呼び径２５−の
玉形ｆｆｔ−製作し、高圧水に対する耐エロージヨン性
を試験した。図において１１は弁箱、１２Ｆｉ弁箱の弁
座、１３は弁体、１４は弁体ノ弁座、 １５は弁棒、
１６はボンネット、１７はハンドルを示す、オ良比較例
として、上記比較例の試料４の合金を用いて同一構造の
玉形弁を製作し、同一条件下にて試験した。その結果を
表−３に併せて示す。In addition, the alloy of Sample 3 of the above example was overlay welded to each valve seat of the valve body and valve body to fabricate a sphere with a nominal diameter of 25 mm as shown in Fig. 2, and to provide erosion resistance against high pressure water. tested for sex. In the figure, 11 is the valve box, 12 is the valve seat of the Fi valve box, 13 is the valve body, 14 is the valve seat of the valve body, 15 is the valve stem,
Reference numeral 16 indicates a bonnet, and reference numeral 17 indicates a handle. As a good comparative example, a globe valve with the same structure was manufactured using the alloy of sample 4 of the comparative example, and was tested under the same conditions. The results are also shown in Table-3.
なお、試験は、あらかじめ弁体の弁座の２ケ所につけた
深さ２箇１幅２饋のＶ溝の幅を、差圧４００ ｋｇ７ｃ
ｍ２．流速４５０ ｍ／ｓｅｅ、 ５０ ℃温水の１
００時間通水後に測定して行なった。In addition, in the test, the width of the V-groove, which was made in advance at two places on the valve seat of the valve body, with two depths and two widths, was subjected to a differential pressure of 400 kg7c.
m2. Flow rate 450 m/see, 50 ℃ hot water 1
The measurement was carried out after passing water for 00 hours.
表−３
表−３から明らからように１本発明に係る玉形弁は、比
較例のものに比べて二に−ジョン損耗が少なく、耐エロ
ージヨン性に優れていることがわかる。Table 3 As is clear from Table 3, it can be seen that the globe valve according to the present invention has significantly less wear and tear on the joists than the comparative example, and has excellent erosion resistance.
以上の結果から明らかなように１本発１ｊｌｉＫ係る弁
は、弁箱の弁座および／ｌたは弁体の弁座に使用するＮ
１−Ｃｒ−Ｎｂ −Ｍｏ−１系合金の耐摩耗性および耐
工ｐ−ジョ／性が高いえめ、従来の姐基耐摩耗・耐エロ
ージヨン合金を使用し九弁に比べて、耐摩耗性および耐
エロージヨン性に優れた弁を得ることができる。また、
コバルト會放出しないことＫよシ、化学および原子力等
の各種のプラントの流路の開閉に好適な弁である。As is clear from the above results, the valve according to the one-shot 1jliK has a large number of N used for the valve seat of the valve body and/or the valve seat of the valve body.
Since the 1-Cr-Nb-Mo-1 alloy has high wear resistance and mechanical resistance, it has better wear resistance and erosion resistance compared to the conventional 9-valve using a wear-resistant and erosion-resistant alloy. A valve with excellent erosion resistance can be obtained. Also,
This valve does not release cobalt and is suitable for opening and closing flow paths in various chemical and nuclear plants.
図面は本発明の実施例を示し、第１図は仕切弁の縦断面
図、第２図は玉形弁の縦断面図である。
１．１１・・・弁箱、２．１２・・・弁箱の弁座、３゜
１３・・・弁体、４．１４・・・弁体の弁座、５，１５
・・・弁棒、６，１６・・・ボンネット、７．１７・・
・ハンドル。The drawings show embodiments of the present invention, with FIG. 1 being a longitudinal sectional view of a gate valve, and FIG. 2 being a longitudinal sectional view of a globe valve. 1.11...Valve box, 2.12...Valve seat of the valve box, 3゜13...Valve body, 4.14...Valve seat of the valve body, 5,15
...Valve stem, 6,16...Bonnet, 7.17...
·handle.
Claims (1)
ロム（Ｃｒ ） １０〜４５重量慢、ニオブ（Ｎｂ ）
３〜１５重量−、モリブデン（Ｍ・）２０１量−以下
、ホウ素（Ｂ）０．０１〜２．０重量ＩＩシよび残部が
ニッケル（Ｎ１）からなる合金であることを特徴とする
弁。At least the surface of the valve body and the valve seat of the valve body is made of chromium (Cr) 10-45%, niobium (Nb).
3 to 15% by weight, molybdenum (M.) 201% by weight or less, boron (B) 0.01 to 2.0% by weight, and the balance consisting of nickel (N1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030182A JPS58187663A (en) | 1982-04-28 | 1982-04-28 | Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030182A JPS58187663A (en) | 1982-04-28 | 1982-04-28 | Valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58187663A true JPS58187663A (en) | 1983-11-01 |
Family
ID=13427495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7030182A Pending JPS58187663A (en) | 1982-04-28 | 1982-04-28 | Valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58187663A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754950A (en) * | 1984-10-30 | 1988-07-05 | Kabushiki Kaisha Toshiba | Valve |
| US4776566A (en) * | 1987-07-10 | 1988-10-11 | Henry Vogt Machine Co. | Raised hardface overlay valve seat |
| US5633094A (en) * | 1994-10-28 | 1997-05-27 | Hitachi, Ltd. | Valve having facing layers of co-free Ni-base Alloy |
-
1982
- 1982-04-28 JP JP7030182A patent/JPS58187663A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754950A (en) * | 1984-10-30 | 1988-07-05 | Kabushiki Kaisha Toshiba | Valve |
| US4776566A (en) * | 1987-07-10 | 1988-10-11 | Henry Vogt Machine Co. | Raised hardface overlay valve seat |
| US5633094A (en) * | 1994-10-28 | 1997-05-27 | Hitachi, Ltd. | Valve having facing layers of co-free Ni-base Alloy |
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