API · ASME · DIN · EN 規格対応の産業用バルブ
同心（コンセントリック）バタフライバルブ
コンセントリックバタフライバルブはステムがディスク中心、ディスクがボア中心に位置し、ゴムシート上のディスクが全周で均一に接触します。低圧の水道設備・一般産業用途向けの経済的で軽量な1/4回転弁です。範囲は2"～72"（DN50～DN1800）、PN6～PN16（85～232psi）、ボディはダクタイル鋳鉄・炭素鋼・ステンレス鋼・青銅、端接続はウェーファー・ラグ・RFフランジ、操作はレバー・ギア・空圧・電動・油圧。シールは弾性材ベース—EPDM（飲料水WRAS対応）、NBR（油性流体）、PTFE（pH1～14の腐食性流体）—で、参考となるソフトシート品はEN 12266 Class Aのゼロリーク締切、ダブテール/圧力リング式シートはライン上で交換可能です。ディスクがストローク途中でシートを擦るため、シート摩擦とトルク（ストローク約90°、参考品のDN200で手動≤80N·m）、温度（標準-20～120℃、304L強化で-40℃）、流体適合性が運用限界を決め、より高温・高圧では単/複オフセット設計へ移行します。規格はAPI 609、MSS SP-67、ISO 17292、GB/T 12238、EN 593をカバーし、API 598水圧受入とAPI 607耐火認証が選択可能です。
次のファミリーに属する： バタフライバルブ ファミリー
最終更新： 2026-11
ファミリー仕様
| Nominal valve connection size | 2”~72”(DN50-DN1800) |
|---|---|
| Pressure class / nominal rating designation | 85~232Psi（PN6~PN16） |
| Seat material | NBR, EPDM, PTFE |
| Disc Materials | Ductile Iron, SS304, SS316 |
| Stem material | Stainless Steel 420, Stainless Steel 410 |
| Valve body material | Ductile Iron, Carbon Steel, Stainless Steel, Copper |
| End connection types | Wafer, Lug, RF |
| Operation / closure mode | Lever, Gear, Pneumatic, Electric, Hydraulic |
| Seat leakage class | Seat leakage on the referenced line is specified at EN 12266 Class A with a leakage rate of 5x10-8 m3/s or less, i.e. zero-leakage soft-seal shutoff. |
| Service temperature range | 0 to 80 C |
| Design standards | API 609 |
| Design standards | DIN 3202, DIN 2501 PN10/PN16 |
| Face-to-face dimensional standard | BS 5155 |
| zero offset definition | Definition: a concentric butterfly valve is a quarter-turn valve in which the shaft, disc centre and body centreline are aligned in a zero-offset arrangement, so the disc edge compresses a resilient seat to seal. |
| sealing principle | Sealing is elastomer-based: soft seat materials such as EPDM, NBR or PTFE let the disc press firmly into the seat for a leak-proof seal without excessive torque. |
| seat temp pressure limits | Elastic seats set the operating ceiling: high-temperature or abrasive media compromise the seat, which is why the type is generally kept to moderate conditions. |
| seat friction torque | Because the disc rubs against the resilient seat through part of its travel, seat friction, operating torque, temperature limits and media compatibility must be checked at selection rather than assumed. |
| standards frame | Applicable standards span API 609 (wafer/lug/double-flanged), MSS SP-67, ISO 17292 for petroleum service and GB/T 12238 for flanged and wafer connection valves; EN 593 is cited as the European counterpart. |
| standards project dependent | The exact standard and edition are product- and project-dependent; buyers should specify API 609 or EN 593 plus the required inspection and leakage test requirements. |
| size envelope oem | A representative OEM concentric soft-seal line covers DN40-DN1200 as standard with DN1400-DN2000 available only after engineering evaluation - well inside the tenant band of DN50-DN1800. |
| pressure envelope oem | Standard pressure ratings are PN10/PN16 (1.0/1.6 MPa) with a PN25 (2.5 MPa) upgrade path on the referenced execution. |
| temperature envelope | The referenced soft-seal execution serves water, air and oil media from -20 C to 120 C; a low-temperature tested variant to -40 C requires a 304L material upgrade. |
| low temp option | Cryogenic-leaning duties are handled by option rather than standard build: the referenced line lists low-temperature testing to -40 C with material upgraded to 304L. |
| seat material specifics | Seat media matching: EPDM for drinking water (WRAS certified), NBR for oil media (ASTM No. 3 oil test) and PTFE for strongly corrosive service across pH 1-14. |
| seat replaceability | The seat is retained by a dovetail groove or pressure ring so it can be replaced online without removing the valve from the line after wear. |
| lug end function | The lug body carries threaded inserts both sides, letting the valve be installed independent of the downstream flange so pipework can be opened for maintenance without draining the system. |
| connection classification | Connection variants beyond wafer/lug include double-flange bodies for higher pressure or larger diameter and butt-weld bodies welded permanently into petrochemical lines. |
| open flow resistance | Even fully open the disc and shaft remain in the flow passage, so some pressure loss persists and scales with diameter and disc/shaft geometry. |
| eccentric development | The single-eccentric (offset) design exists specifically to answer concentric wear: offsetting the stem from the disc centre reduces friction, extends sealing life and opens the door to higher temperature and pressure duties. |
| actuation torque | Manual builds use a fixed 90-degree stroke with limit-stop feedback; on the referenced line lever operation needs no more than 80 N-m at DN200. |
| testing frame | Acceptance testing on the referenced line runs to API 598 hydrostatic at 1.5 times rating, with API 607 fire-safe certification available through a metal-seal redundancy design. |
| seat temperature ratings table | Buna-N seat: +10 to 180 °F (-12 to 82 °C), EPDM seat (2"–16"): -30 to 275 °F (-34 to 135 °C), EPDM seat (18" and above): -30 to 225 °F (-34 to 107 °C), fluoroelastomer (FKM) seat: 10 to 400 °F (-12 to 204 °C) |
| tight shutoff pressure rating | pressure ratings for tight shutoff up to the seat material temperature limit on wafer and lug bodies: 200 psi for 2"–12" and 150 psi for 14"–72" |
| double flange tight shutoff pressure rating | pressure ratings for tight shutoff up to the seat material temperature limit on double-flanged bodies: 232 psi for 3"–14" and 150 psi for 16"–72" |
| cv fullopen wafer lug | full-open Cv (US-GPM at 1 psi ΔP) spans 115 at 2 in to 73,426 at 30 in on wafer and lug style bodies |
| cv partial open 70deg | Cv at 70° disc opening spans 70 at 2 in to 44,545 at 30 in (US-GPM at 1 psi ΔP) |
| cv partial open 50deg | Cv at 50° disc opening spans 27 at 2 in to 17,010 at 30 in (US-GPM at 1 psi ΔP) |
| torque test basis sizing | seating/unseating torque charts derived from test data with water at 60°F; dry-gas duties multiply by 2.0; figures carry no safety factor — multiply by 1.2 for single-valve actuator sizing or 2.0 for three-way (tee) applications |
| vacuum service rating | vacuum service rating: zero leakage at 24 in Hg vacuum |
| dead end pressure rating | bi-directional dead-end service capability to 200 psi (2"–12") and 150 psi (14"–24") is standard on lug style valves |
| asme flange compatibility | compatible with ASME B16.1 and ASME B16.5 flanges (2"–24"), compatible with ASME B16.47 Series A (MSS SP-44) flanges (28"–72") |
| mss design compliance | designed to comply with MSS SP-67 and MSS SP-25 |
| awwa proof of design | valves 2"–20" meet the intent of and have passed the AWWA C504-87 Section 5 proof of design tests |
| potable water ped certification | CE/PED certification available for 2"–24", NSF/ANSI 61 & 372 certified for potable water and lead-free service (aluminium-bronze or stainless steel builds) |
| marine type approval | type approval certification from ABS and USCG Category A for marine applications (2"–24") |
| seat temperature service caveats | at low temperature the elastomer durometer changes — the hardened seat may increase operating torque beyond the structural limits of the stem and/or disc-to-stem configuration, published temperature ranges may have to be modified in valve duty; ranges shown are adjusted accordingly, on the fluoroelastomer (FKM) seat build the operating pressure is reduced above 275°F, field replacement of seats in sizes 14" and above requires factory service |
| composite execution envelope | composite-body resilient seated wafer line: DN 40 to 300 (NPS 1.5 to 12), -40 to +150 °C (-40 to +300 °F), 10/16 bar (145/232 psi), flange drilling DIN PN 6/10/16, ASME 150, JIS 10K and AS 2129 Table E |
| face to face resilient composite | face-to-face per EN 558-1/Table 5 and API 609 |
| iso5211 integrated top plate | integrated ISO 5211 top plate: actuator flange per ISO 5211 without a separate mounting bracket |
| line velocity limit | usable in high line velocity applications up to 12 m/sec |
| bidirectional leak rate | bubble-tight shut-off in both directions per EN 12266-1 leak rate A |
| water marine approvals | water approvals KIWA, WRAS and NSF; certified and approved per Det Norske Veritas (DNV) |
| iso5211 pad series by size | ISO 5211 pad series F-05 (DN40–DN50), F-07 (DN65–DN150) and F-12 (DN200–DN300) |
| shaft diameter envelope | shaft diameter (h9 class) 12 mm at DN40–DN50 up to 25 mm at DN250–DN300 |
| stem seal dual design | primary stem sealing exceeds the valve pressure rating and prevents shaft-area leakage to atmosphere; a secondary shaft sealing provides back-up safety |
| kv fullopen largest size | highest tabulated Kv/Cv value is 9,872.0 / 11,452.00 at the largest listed size fully open (90° column) |
| composite weight envelope | valve mass 0.6 kg (DN40) rising to 10.8 kg (DN300) on the composite execution |
| face to face din series | face-to-face EN 558 Series 20, face-to-face ISO 5752 Series 20, face-to-face API 609 Table 1 |
| flange accommodation standards | flange drilling EN 1092 PN 6/10/16, ASME Class 150, AS 4087 PN 16, flange face EN 1092 Form A/B, ASME RF/FF |
| top flange iso5211 marking | top flange per EN ISO 5211; valve marking per EN 19 |
| tightness dual standard | tightness check per EN 12266 leakage rate A and ISO 5208 Category 3 |
| extended temp pressure envelope | a resilient wafer execution rated -40°C to +200°C (depending on pressure, medium and material) at a maximum operating pressure of 16 bar |
| kv test basis throttling | Kv is the water flow in m³/h at 5°C to 30°C (41°F to 86°F) at 1 bar ΔP; published Kv values based on tests by the Delft Hydraulics Laboratories (Netherlands); throttle function linear between 30° and 70° opening |
| flow velocity limits | permissible flow velocity max. 4.5 m/s for liquids and max. 70 m/s for gases |
| breakaway torque basis | published torque values are initial breakaway torques taken with liquids and lubricating media, to be treated as approximate: the effective value depends on pressure, medium, rubber quality and temperature |
| shaft guidance design | triple shaft bearings prevent shaft deflection and guarantee valve guidance over long service; four flange mounting holes locate the valve between flanges; installation in any desired position; maintenance-free |
| seat material code options | seat material options NBR, EPDM, CSM, FPM and VSI |
| shaft material options | shaft material options stainless steels X39CrMo17-1 and X14CrMoS17, or nickel-molybdenum alloy |
| size | 2”~72”(DN50-DN1800) |
| Pressure Rating | 85~232Psi（PN6~PN16） |
| end connection | Wafer, Lug, RF |
| medium | Water, Oil, Gas |
| top flange | ISO 5211 |
範囲と出所の注記
| size envelope | Size envelope: tenant band DN50-DN1800 (2in-72in) exceeds the referenced Tianyu standard range DN40-DN1200, which only reaches DN1400-DN2000 after engineering evaluation - the tenant band is an aggregate of OEM envelopes, not one build. |
|---|---|
| pressure framing | Pressure framing: tenant reference 85-232 psi (PN6-PN16) matches the standard PN10/16 builds, but the Tianyu line offers a PN25 (2.5 MPa) upgrade path that sits outside the tenant reference range. |
| standard coverage | Standard coverage: existing design_standard lists API 609 only, while industry practice spans API 609, MSS SP-67, ISO 17292, GB/T 12238 and EN 593 - edition and scope are project-dependent. |
| leakage claim | Leakage claim: EN 12266 Class A zero-leakage soft-seal shutoff is a referenced-OEM figure; hard-seated or high-temperature builds will not meet the same class. |
注文と書類
書類
お問い合わせの際に必要な書類セットをお知らせください——この型番仕様の典型的な項目（材質証明書、記載の検査規格に基づく試験報告書、寸法図）は、見積時に確認のうえ供給されます。
お見積り
見積可能なお問い合わせには次の事項をご記入ください：呼び径と圧力レーティング、ボディ・シート材質の希望、接続方式、操作方式、温度を含む使用流体。このページの典型値はベンチマーク参考範囲です。拘束力のある値は見積時に確定します。
サンプルと供給
供給条件、発注数量、納期は注文ごとに協議します——お問い合わせの際に納入国と希望スケジュールをお知らせください。
保管と輸送
バルブはシート・シールを紫外線、オゾン、変形から保護して保管し、据付まで端面保護カバーを取り付けたままにしてください。エラストマーまたは PTFE シートの仕様では、屋外での長期保管を避けてください——シート材料は直射日光と凍結条件で最も劣化が早くなります。
よくある質問
同心（コンセントリック）バタフライバルブの見積依頼には何を含めるべきですか？
適用規格とクラス、呼びサイズ、ボディおよびシート材、使用媒体と温度、納入先——欠落している項目は見積の過程で確認します。
同心（コンセントリック）バタフライバルブにはどのサイズと圧力等級がありますか？
このバルブの検証済みサイズと圧力等級範囲はまだ本ページに掲載されていません——お客様の使用条件に適したサイズと圧力等級は見積の過程でご提案し、確認します。使用条件を問い合わせに添えていただければ、選定結果を見積書に記載します。
同心（コンセントリック）バタフライバルブにはどのボディ材質がありますか？
このバルブの検証済みボディ材質範囲はまだ本ページに掲載されていません——お客様の使用条件に適したボディ材質は見積の過程でご提案し、確認します。使用条件を問い合わせに添えていただければ、選定結果を見積書に記載します。
同心（コンセントリック）バタフライバルブ の見積依頼
こちらからご要望をご提出ください——見積に直結するお問い合わせには、適用規格とクラス、口径、材質、流体、温度、納入先をご記入ください.
お客様の情報の取り扱いについては、プライバシー通知をご覧ください。