JP5014596B2 - Float type steam trap - Google Patents

Float type steam trap Download PDF

Info

Publication number
JP5014596B2
JP5014596B2 JP2005175445A JP2005175445A JP5014596B2 JP 5014596 B2 JP5014596 B2 JP 5014596B2 JP 2005175445 A JP2005175445 A JP 2005175445A JP 2005175445 A JP2005175445 A JP 2005175445A JP 5014596 B2 JP5014596 B2 JP 5014596B2
Authority
JP
Japan
Prior art keywords
exhaust valve
valve port
bimetal
port
curved
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
Application number
JP2005175445A
Other languages
Japanese (ja)
Other versions
JP2006349037A (en
Inventor
正 小池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tlv Co Ltd
Original Assignee
Tlv Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tlv Co Ltd filed Critical Tlv Co Ltd
Priority to JP2005175445A priority Critical patent/JP5014596B2/en
Publication of JP2006349037A publication Critical patent/JP2006349037A/en
Application granted granted Critical
Publication of JP5014596B2 publication Critical patent/JP5014596B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Temperature-Responsive Valves (AREA)

Description

本発明は、蒸気使用機器や蒸気輸送管に発生する復水を自動的に排出するスチームトラップに関し、特に弁室内に配置したフロートによって弁口を開閉するフロート式スチームトラップに関する。   The present invention relates to a steam trap that automatically discharges condensate generated in steam-using equipment and a steam transport pipe, and more particularly to a float-type steam trap that opens and closes a valve opening by a float disposed in a valve chamber.

フロート式スチームトラップは、気体と液体の比重差を利用して蒸気は排出せず復水を自動的に排出するものであるが、弁室内に空気が充満するとフロートが弁口を閉じるので、いわゆるエアバインディングを起こしてしまう問題点があった。そこで従来から、バイメタルを用いてエアバインディングを防止することが行われている。その一例が実公平３−２５５１８号公報に示されている。これは、弁ケーシングで入口と弁室と出口を形成し、弁室と出口を連通する弁口を弁室下部に形成し、弁口を開閉するフロートを弁室内に配置し、弁室と出口を連通する排気弁口を弁室上部に形成し、弁室上部に保持部材を固定し、排気弁口と保持部材の間に反転バイメタルを配置し、反転バイメタルの中央に排気弁口を開閉する排気弁体を取り付け、反転バイメタルの上方に反転バイメタルの外周縁の上面が当接して上動を規制するストッパーを設け、反転バイメタルと保持部材の間に反転バイメタルを排気弁口の方向に付勢する弾性部材を配置したものである。反転バイメタルは低温時に下に凸状に反転して外周縁上面がストッパーに当接し、中央の排気弁体が排気弁口から離座して排気弁口を開き、高温時に上に凸状に反転して外周縁上面がストッパーから離れ、中央の排気弁体が排気弁口に着座して排気弁口を閉じる。   Float steam traps use the specific gravity difference between gas and liquid to automatically discharge condensate without discharging steam, but the so-called float closes the valve opening when the valve chamber is filled with air, so-called There was a problem that caused air binding. Therefore, conventionally, air binding is prevented by using a bimetal. One example is shown in Japanese Utility Model Publication No. 3-25518. The valve casing forms an inlet, a valve chamber, and an outlet, a valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber, and a float that opens and closes the valve port is disposed in the valve chamber. An exhaust valve port is formed in the upper part of the valve chamber, a holding member is fixed to the upper part of the valve chamber, an inverted bimetal is disposed between the exhaust valve port and the holding member, and the exhaust valve port is opened and closed in the center of the inverted bimetal. An exhaust valve body is attached, and a stopper that restricts the upward movement is provided above the reversal bimetal with the upper surface of the outer periphery of the reversal bimetal in contact, and the reversal bimetal is urged in the direction of the exhaust valve port between the reversal bimetal and the holding member The elastic member which arranges is arrange | positioned. Inverted bimetal reverses convexly at low temperatures, the outer peripheral upper surface abuts against the stopper, the central exhaust valve body separates from the exhaust valve port, opens the exhaust valve port, and inverts upward at high temperature Then, the upper surface of the outer peripheral edge is separated from the stopper, and the central exhaust valve body is seated on the exhaust valve port to close the exhaust valve port.

上記従来のものは、反転バイメタルや排気弁体が比較的短時間に損傷する問題点があった。これは、反転バイメタルが所定の温度でスナップ動作的に反転するために、低温時に下に凸状に反転するときに反転バイメタルの外周縁上面がストッパーに衝突し、高温時に上に凸状に反転するときに排気弁体が排気弁口に衝突するためである。
実公平３−２５５１８号公報 The prior art has a problem that the inverted bimetal and the exhaust valve body are damaged in a relatively short time. This is because the inversion bimetal reverses in a snap action at a predetermined temperature, so that the upper surface of the outer periphery of the inversion bimetal collides with the stopper when it inverts downward at a low temperature, and inverts upward at a high temperature. This is because when the exhaust valve body collides with the exhaust valve port.
No. 3-25518

解決しようとする課題は、バイメタルや排気弁体の損傷を防止できるフロート式スチームトラップを提供することである。   The problem to be solved is to provide a float steam trap that can prevent damage to the bimetal and the exhaust valve body.

上記の課題を解決するために講じた本発明の手段は、弁ケーシングで入口と弁室と出口を形成し、弁室と出口を連通する弁口を弁室下部に形成し、弁口を開閉するフロートを弁室内に配置し、弁室と出口を連通する排気弁口を弁室上部に形成し、弁室上部に保持部材を固定し、排気弁口と保持部材の間に湾曲バイメタルを配置し、湾曲バイメタルの中央に排気弁口を開閉する排気弁体を取り付け、湾曲バイメタルの上方に湾曲バイメタルの外周縁の上面が当接して上動を規制するストッパーを設け、湾曲バイメタルと保持部材の間に湾曲バイメタルを排気弁口の方向に付勢する弾性部材を配置し、湾曲バイメタルは低温時に概略平坦形状で外周縁上面がストッパーに当接し中央の排気弁体が排気弁口から離座して排気弁口を開き、温度上昇にしたがって湾曲バイメタルは徐々に上に凸状に変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口に徐々に近付き所定の高温で排気弁体が排気弁口に緩やかに着座して排気弁口を閉じ、温度低下にしたがって湾曲バイメタルは徐々に平坦形状に戻るように変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口から離座し排気弁体が排気弁口から徐々に遠ざかり所定の低温で概略平坦形状となり排気弁口を全開することを特徴とするフロート式スチームトラップにある。 The means of the present invention devised to solve the above problems is that the valve casing forms an inlet, a valve chamber, and an outlet, a valve port that connects the valve chamber and the outlet is formed in the lower portion of the valve chamber, and opens and closes the valve port. A float is placed in the valve chamber, an exhaust valve port communicating with the valve chamber and the outlet is formed in the upper part of the valve chamber, a holding member is fixed to the upper part of the valve chamber, and a curved bimetal is placed between the exhaust valve port and the holding member An exhaust valve body that opens and closes the exhaust valve port is attached to the center of the curved bimetal, and a stopper is provided above the curved bimetal so that the upper surface of the outer periphery of the curved bimetal is in contact with the curved bimetal so as to restrict upward movement. An elastic member that urges the curved bimetal in the direction of the exhaust valve port is arranged in between.The curved bimetal has a substantially flat shape at low temperatures, the upper surface of the outer peripheral edge abuts against the stopper, and the central exhaust valve body is separated from the exhaust valve port. Open the exhaust valve port to increase the temperature. Gradually approaches slowly the exhaust valve body is an exhaust valve port at a predetermined high temperature exhaust valve member is in the exhaust valve port in a state where the outer peripheral edge top curved bimetal deforms in a convex shape upward gradually Thus abuts against the stopper The curved bimetal gradually deforms so as to return to a flat shape as the temperature drops, and the exhaust valve body is separated from the exhaust valve port with the upper surface of the outer peripheral edge in contact with the stopper. exhaust valve member is in the float steam trap to gradually move away feature that you fully open the exhaust valve port becomes schematic flattened shape at a predetermined low temperature from the exhaust valve port.

本発明は、温度変化にしたがって徐々に変形する湾曲バイメタルを用いることにより、湾曲バイメタルのストッパーへの衝突を防止でき、また排気弁体の排気弁口への衝突を防止できる。そのため、湾曲バイメタルと排気弁体の損傷を防止でき、長期に渡ってエアバインディングを防止できるという優れた効果を生じる。   In the present invention, by using the curved bimetal that gradually deforms according to the temperature change, the collision of the curved bimetal with the stopper can be prevented, and the collision of the exhaust valve body with the exhaust valve port can be prevented. Therefore, the curved bimetal and the exhaust valve body can be prevented from being damaged, and an excellent effect that air binding can be prevented for a long time is produced.

湾曲バイメタルは低温時に概略平坦形状で外周縁上面がストッパーに当接し、中央の排気弁体が排気弁口から離座して排気弁口を開いている。そして、温度上昇にしたがって湾曲バイメタルは徐々に上に凸状に変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口に徐々に近付き、所定の高温で排気弁体が排気弁口に緩やかに着座して排気弁口を閉じる。また、温度低下にしたがって湾曲バイメタルは徐々に平坦形状に戻るように変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口から離座し、排気弁体が排気弁口から徐々に遠ざかり所定の低温で概略平坦形状となり排気弁口を全開する。このように、湾曲バイメタルはストッパーに衝突しないので、また排気弁体は排気弁口に衝突しないので、湾曲バイメタルと排気弁体の損傷を防止できる。 The curved bimetal has a substantially flat shape at low temperatures, the upper surface of the outer peripheral edge abuts against the stopper, and the central exhaust valve body is separated from the exhaust valve opening to open the exhaust valve opening. As the temperature rises, the curved bimetal gradually deforms upward and the exhaust valve body gradually approaches the exhaust valve port with the upper surface of the outer peripheral edge in contact with the stopper. Gently sit on the exhaust valve port and close the exhaust valve port. In addition, the curved bimetal gradually deforms so as to return to a flat shape as the temperature decreases, and the exhaust valve body is separated from the exhaust valve port with the upper surface of the outer peripheral edge in contact with the stopper. away gradually from becomes schematic flattened shape at a predetermined low temperature to fully open the exhaust valve port. Thus, since the curved bimetal does not collide with the stopper, and the exhaust valve body does not collide with the exhaust valve port, damage to the curved bimetal and the exhaust valve body can be prevented.

上記の技術的手段の具体例を示す実施例を説明する（図１ないし図３参照）。本体１に蓋２をボルト（図示せず）で締結して弁ケーシングを構成し、内部に弁室３を形成する。弁室３の上部に入口４を開口させ、入口４と同一軸上に出口５を形成する。円筒形状で上部に異物捕捉用の濾過孔を開けたスクリーン６を介して入口４と弁室３を連通する。本体１の下部に弁座取付口７から弁座部材８をねじ結合し、弁座取付口７をプラグ９で塞ぐ。弁座部材８は一端が弁室３に開口し他端が出口５に連通する出口通路１０に開口した弁口１１を有する。弁室４は弁口１１から出口通路１０を通して出口５に連通する。   An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 to 3). A lid 2 is fastened to the main body 1 with bolts (not shown) to form a valve casing, and a valve chamber 3 is formed inside. An inlet 4 is opened at the top of the valve chamber 3 and an outlet 5 is formed on the same axis as the inlet 4. The inlet 4 and the valve chamber 3 are communicated with each other through a screen 6 having a cylindrical shape and a filter hole for capturing foreign matter at the top. The valve seat member 8 is screwed to the lower portion of the main body 1 from the valve seat mounting port 7, and the valve seat mounting port 7 is closed with a plug 9. The valve seat member 8 has a valve port 11 having one end opened to the valve chamber 3 and the other end opened to an outlet passage 10 communicating with the outlet 5. The valve chamber 4 communicates from the valve port 11 to the outlet 5 through the outlet passage 10.

弁室３内に中空球形のフロート１２を自由状態で配置する。フロート１２は外表面で直接に弁口１１を開閉する。フロート１２の上方に浮上したフロート１２を保持するフロートカバー１３を取り付ける。フロートカバー１３には上面の中央に１つ及び上面の周囲に多数の通孔を開けている。弁室３の底部にフロート１２の降下位置を定めるフロート座１４を形成する。   A hollow spherical float 12 is disposed in the valve chamber 3 in a free state. The float 12 opens and closes the valve port 11 directly on the outer surface. A float cover 13 that holds the float 12 that has floated above the float 12 is attached. The float cover 13 has one through hole at the center of the upper surface and a number of through holes around the upper surface. A float seat 14 that defines the lowering position of the float 12 is formed at the bottom of the valve chamber 3.

蓋２に収容ケース１５を挟んで排気弁座部材１６をねじ結合する。排気弁座部材１６は一端が弁室３に開口し他端が出口通路１０に連通する排気出口通路１７に開口した排気弁口１８を有する。弁室３は排気弁口１８から排気出口通路１７、出口通路１０を通して出口５に連通する。収容ケース１５に円板形状で異物捕捉用の濾過孔を多数開けたスクリーンから成る保持部材１９をスナップリング２０で固定する。保持部材１９と排気弁座部材１６の間に湾曲バイメタル２１を配置する。湾曲バイメタル２１の中央に排気弁口１８を開閉する排気弁体２２をスナップリング２３で取り付ける。湾曲バイメタル２１は流体通過用の２つの切欠き２４を有する。収容ケース１５は湾曲バイメタル２１の外周縁の上方に複数個のリブから成るストッパー２５を有する。湾曲バイメタル２１と保持部材１６の間に湾曲バイメタル２１を排気弁口１８の方向に付勢するコイルスプリングから成る弾性部材２６を配置する。   The exhaust valve seat member 16 is screwed to the lid 2 with the housing case 15 in between. The exhaust valve seat member 16 has an exhaust valve port 18 having one end opened to the valve chamber 3 and the other end opened to the exhaust outlet passage 17 communicating with the outlet passage 10. The valve chamber 3 communicates from the exhaust valve port 18 to the outlet 5 through the exhaust outlet passage 17 and the outlet passage 10. A holding member 19 made of a screen having a disk shape and a large number of filtration holes for capturing foreign matter is fixed to the housing case 15 by a snap ring 20. A curved bimetal 21 is disposed between the holding member 19 and the exhaust valve seat member 16. An exhaust valve body 22 that opens and closes the exhaust valve port 18 is attached to the center of the curved bimetal 21 with a snap ring 23. The curved bimetal 21 has two notches 24 for fluid passage. The housing case 15 has a stopper 25 composed of a plurality of ribs above the outer peripheral edge of the curved bimetal 21. An elastic member 26 made of a coil spring that urges the curved bimetal 21 in the direction of the exhaust valve port 18 is disposed between the curved bimetal 21 and the holding member 16.

蒸気と復水及び空気が入口４から弁室３に流入し、蒸気と空気が上部に復水が下部に分離して溜まる。弁室３内の温度が低いとき、湾曲バイメタル２１は概略平坦形状で入口５側の流体圧力と弾性部材２６により外周縁上面がストッパー２５に当接し、中央の排気弁体２２が排気弁口１８から離座して排気弁口１８を開き、低温の空気や復水を排気弁口１８から排気出口通路１７、出口通路１０を通して出口５に排出する。低温の空気や復水の排出により弁室３内の温度が高くなってくると、湾曲バイメタル２１は温度上昇にしたがって徐々に上に凸状に変形して外周縁上面がストッパー２５に当接した状態で排気弁体２２が排気弁口１８に徐々に近付き、所定の高温で排気弁体２２が排気弁口１８に緩やかに着座して排気弁口１８を閉じ、蒸気の漏出を防止する。また、弁室３内の温度低下にしたがって湾曲バイメタル２１は徐々に平坦形状に戻るように変形して外周縁上面がストッパー２５に当接した状態で排気弁体２２が排気弁口１８から離座し、排気弁体２２が排気弁口１８から徐々に遠ざかり所定の低温で概略平坦形状となり排気弁口１８を全開する。弁室５内の液面が上昇するとフロート１２は浮上して弁口９から離座して弁口９を開き、復水を弁口９から出口通路１０を通して出口５に排出する。復水の排出により液面が降下するとフロート１２は降下して弁口９に着座して弁口９を閉じ、蒸気の漏洩を防止する。 Steam, condensate and air flow into the valve chamber 3 from the inlet 4, and steam and air separate and accumulate in the upper part and condensate in the lower part. When the temperature in the valve chamber 3 is low, the curved bimetal 21 has a substantially flat shape, the upper surface of the outer peripheral edge abuts against the stopper 25 due to the fluid pressure on the inlet 5 side and the elastic member 26, and the central exhaust valve body 22 is connected to the exhaust valve port 18. The exhaust valve port 18 is opened, and low-temperature air or condensate is discharged from the exhaust valve port 18 to the outlet 5 through the exhaust outlet passage 17 and the outlet passage 10. When the temperature in the valve chamber 3 rises due to the discharge of low-temperature air or condensate, the curved bimetal 21 gradually deforms upward as the temperature rises, and the upper surface of the outer peripheral edge comes into contact with the stopper 25. In this state, the exhaust valve body 22 gradually approaches the exhaust valve port 18, and the exhaust valve body 22 is gently seated on the exhaust valve port 18 at a predetermined high temperature to close the exhaust valve port 18 and prevent leakage of steam. In addition, the curved bimetal 21 is gradually deformed so as to return to a flat shape as the temperature in the valve chamber 3 decreases, and the exhaust valve body 22 is separated from the exhaust valve port 18 in a state where the outer peripheral surface is in contact with the stopper 25. Then, the exhaust valve body 22 gradually moves away from the exhaust valve port 18 and becomes substantially flat at a predetermined low temperature, and the exhaust valve port 18 is fully opened. When the liquid level in the valve chamber 5 rises, the float 12 rises, leaves the valve port 9 and opens the valve port 9, and condensate is discharged from the valve port 9 through the outlet passage 10 to the outlet 5. When the liquid level falls due to the discharge of condensate, the float 12 descends and sits on the valve port 9 to close the valve port 9 to prevent vapor leakage.

本発明のフロート式スチームトラップの断面図。Sectional drawing of the float type steam trap of this invention. 図１の湾曲バイメタル部分の拡大断面図。The expanded sectional view of the curved bimetal part of FIG. 図１の湾曲バイメタルの平面図。The top view of the curved bimetal of FIG.

符号の説明Explanation of symbols

１ 本体
２ 蓋
３ 弁室
４ 入口
５ 出口
８ 弁座部材
１１ 弁口
１２ フロート
１６ 排気弁座部材
１８ 排気弁口
１９ 保持部材
２１ 湾曲バイメタル
２２ 排気弁体
２５ ストッパー
２６ 弾性部材
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve chamber 4 Inlet 5 Outlet 8 Valve seat member 11 Valve port 12 Float 16 Exhaust valve seat member 18 Exhaust valve port 19 Holding member 21 Curved bimetal 22 Exhaust valve body 25 Stopper 26 Elastic member

Claims (1)

弁ケーシングで入口と弁室と出口を形成し、弁室と出口を連通する弁口を弁室下部に形成し、弁口を開閉するフロートを弁室内に配置し、弁室と出口を連通する排気弁口を弁室上部に形成し、弁室上部に保持部材を固定し、排気弁口と保持部材の間に湾曲バイメタルを配置し、湾曲バイメタルの中央に排気弁口を開閉する排気弁体を取り付け、湾曲バイメタルの上方に湾曲バイメタルの外周縁の上面が当接して上動を規制するストッパーを設け、湾曲バイメタルと保持部材の間に湾曲バイメタルを排気弁口の方向に付勢する弾性部材を配置し、湾曲バイメタルは低温時に概略平坦形状で外周縁上面がストッパーに当接し中央の排気弁体が排気弁口から離座して排気弁口を開き、温度上昇にしたがって湾曲バイメタルは徐々に上に凸状に変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口に徐々に近付き所定の高温で排気弁体が排気弁口に緩やかに着座して排気弁口を閉じ、温度低下にしたがって湾曲バイメタルは徐々に平坦形状に戻るように変形して外周縁上面がストッパーに当接した状態で排気弁体が排気弁口から離座し排気弁体が排気弁口から徐々に遠ざかり所定の低温で概略平坦形状となり排気弁口を全開することを特徴とするフロート式スチームトラップ。 The valve casing forms an inlet, a valve chamber, and an outlet, a valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber, a float that opens and closes the valve port is disposed in the valve chamber, and the valve chamber communicates with the outlet An exhaust valve body in which an exhaust valve port is formed in the upper part of the valve chamber, a holding member is fixed to the upper part of the valve chamber, a curved bimetal is disposed between the exhaust valve port and the holding member, and the exhaust valve port is opened and closed in the center of the curved bimetal An elastic member that urges the curved bimetal in the direction of the exhaust valve port between the curved bimetal and the holding member by providing a stopper that restricts the upward movement by contacting the upper surface of the outer periphery of the curved bimetal above the curved bimetal. The curved bimetal is generally flat at low temperatures, the upper surface of the outer periphery abuts against the stopper, the central exhaust valve body is separated from the exhaust valve port, and the exhaust valve port is opened. deformed convexly upward Outer periphery upper surface is gently seated exhaust valve member is an exhaust valve port with gradually approaches a predetermined high-temperature exhaust valve member is in the exhaust valve port in a state in contact with the stopper closing the exhaust valve port, curved as the temperature decreases The bimetal is gradually deformed to return to a flat shape, and the exhaust valve body is separated from the exhaust valve port with the upper surface of the outer peripheral edge in contact with the stopper, and the exhaust valve body is gradually moved away from the exhaust valve port at a predetermined low temperature. schematic planar shape as will float steam trap characterized that you fully open the exhaust valve port.
JP2005175445A 2005-06-15 2005-06-15 Float type steam trap Expired - Fee Related JP5014596B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005175445A JP5014596B2 (en) 2005-06-15 2005-06-15 Float type steam trap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005175445A JP5014596B2 (en) 2005-06-15 2005-06-15 Float type steam trap

Publications (2)

Publication Number Publication Date
JP2006349037A JP2006349037A (en) 2006-12-28
JP5014596B2 true JP5014596B2 (en) 2012-08-29

Family

ID=37645113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005175445A Expired - Fee Related JP5014596B2 (en) 2005-06-15 2005-06-15 Float type steam trap

Country Status (1)

Country Link
JP (1) JP5014596B2 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518661U (en) * 1978-07-20 1980-02-06
JPH0331919Y2 (en) * 1985-05-14 1991-07-05
JPH0325518Y2 (en) * 1986-09-09 1991-06-03
JPH0341200Y2 (en) * 1986-10-09 1991-08-29
JPH02102995A (en) * 1988-10-13 1990-04-16 Tlv Co Ltd Trap and manufacture thereof
JP2004340097A (en) * 2003-05-19 2004-12-02 Alps Electric Co Ltd Small pump

Also Published As

Publication number Publication date
JP2006349037A (en) 2006-12-28

Similar Documents

Publication Publication Date Title
US4860782A (en) Reducing valve equipped with a vapor-liquid separator
JP5431082B2 (en) Float type drain trap
JP5014596B2 (en) Float type steam trap
JP5202798B2 (en) Steam trap with piping joint
JP5582856B2 (en) Float type steam trap
JP5202792B2 (en) Float type steam trap
JP5431034B2 (en) Exhaust valve
JP5160394B2 (en) Float type drain trap
JP4781861B2 (en) Exhaust valve
JP5202965B2 (en) Exhaust valve
JP5901934B2 (en) steam trap
JP3878248B2 (en) Float type steam trap
JP2009041722A (en) Downward bucket type steam trap
JP2001173824A (en) Air release valve
JP2010249232A (en) Exhaust valve
JP3030530B2 (en) Float type steam trap
JP7357904B2 (en) valve device
JP7368826B2 (en) valve device
JP5220528B2 (en) Downward bucket type steam trap
JP2001173823A (en) Air release valve
JP5220390B2 (en) Exhaust valve
JP5220380B2 (en) Exhaust valve
JPH1182885A (en) Float type drain trap
JP4275509B2 (en) Steam trap with piping joint
JP3878271B2 (en) Float type drain trap

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080421

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101224

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110125

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110301

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110517

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110617

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110913

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120605

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120606

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150615

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 5014596

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees