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直動式減圧弁
直動式減圧弁は1つのコンパクトなボディで二次圧を設定ばねと釣り合わせるため、パイロット配管や外部検知が不要です。空気・水・軽微なプロセス配管の安定した中程度負荷に適したシンプルな応答方式です。範囲はダクタイル鋳鉄（EN-GJS-450/10）ボディ・ボンネット+ステンレス鋼シート・ブッシュ・締結材、設定ばねは55SiCr6鋼、シールはEPDM、一次側はPN16またはPN40、二次側設定範囲は1.5～6bar。選定は二次側設定圧力帯、需要変動に対する流量安定性、弾性材とばね材の温度限界がポイントです。機構資料は1動作の力平衡（1枚のダイヤフラム上で設定ばね対二次圧）、設定圧による閉止応答、構成要素（入口/出口ポート、ばね、検知ダイヤフラム）、パイロット式容量に対する即応性の位置付け、上水道用途、参照仕様範囲（ねじ込み式1～13kgf/cm2、フランジ式ダイヤフラム2～5kgf/cm2、いずれも0～60℃）、水平/垂直据付を補足します。
次のファミリーに属する： 減圧弁 ファミリー
最終更新： 2026-11
ファミリー仕様
| Minimum operating differential pressure | 1 bar |
|---|---|
| Valve body material | Ductile Iron (EN1563 EN-GJS-450/10) |
| Seat material | Stainless Steel (EN10088 1-4301) |
| Service temperature range | -10°C to 70°C |
| upstream pressure | PN16, PN40 |
| downstream pressure | 1.5 to 6 bar |
| spring materials | Steel (1.7104 55siCr6) |
| Seal material | EPDM |
| working principle | Single valve mechanism directly actuated by a sensing element (diaphragm or piston); no pilot loop |
| sensing element | Diaphragm or piston responds directly to outlet (downstream) pressure |
| spring function | Setting spring provides the opposing force against the diaphragm; its tension sets the desired outlet pressure |
| response character | Simple construction with quick response; widely used for steady moderate loads |
| outlet regulation | Holds downstream pressure steady against upstream supply fluctuations |
| setpoint response | When downstream pressure exceeds set point the diaphragm compresses the spring, closing the valve to bring pressure back down |
| construction elements | Inlet port, outlet port, setting spring acting on the diaphragm, and the diaphragm that maintains the set downstream pressure |
| flow stability | Direct-acting designs give reliable performance under varying flow rates and pressures |
| municipal water application | Installed on municipal service lines to protect household appliances and reduce leak risk |
| setpoint envelope example | Threaded direct-acting execution example: set range 1-13 kgf/cm2, 0-60°C, air/water media |
| diaphragm variant envelope | Diaphragm-type direct-acting flanged execution example: set range 2-5 kgf/cm2, 0-60°C, freshwater media |
| mounting orientation | Stable outlet pressure with easy horizontal or vertical installation; stainless builds suit water supply and food processing |
| dra steam envelope | Stainless Steel (ASTM A351 Gr.CF8) Steam Air 1.6 220 0.2 - 1.6 0.014 - 1.0 610 kg/h |
| dra air envelope | Air 1.0 100 0.2 - 1.0 0.014 - 0.4 460 m 3 /h |
| dra soft seat | Soft seat for extra-tight sealing |
| dra reduction ratio | Capable of a 30:1 pressure reduction |
| dra built in screen | Built-in screen ensures extended trouble-free operation |
| dra wetted construction | Wetted parts are of all stainless steel construction with high durability and corrosion resistance for long service life |
| dra secondary stability | Stable secondary pressure |
| dra applications | Compact heat exchangers and compact steam processes |
| drb steam capacity | 3/8" - 2" NPT 15-250 2,141 lbs/hr |
| drb liquid capacity | 3/8" - 2" NPT 15-250 116 GPM |
| drb gas capacity | 3/8" - 2" NPT 15-250 1,189 SCFM |
| drb seat disc | hardened stainless steel seat and disc with a guided stem for extended service life |
| drb internal strainer | An internal strainer protects against dirt and scale |
| drb diaphragm steam | phosphor Bronze diaphragm (Model Code B ) specifically designed for steam service |
| drb diaphragm liquid | for water, air, or other liquid service and have a working temperature range up to 300oF |
| drb droop | a variation of up to 10% of initial set pressure depending on changes in flow through the valve |
| drb double spring | a wider adjustable pressure range which may be desirable in some applications |
| drb body material | heavy duty cast iron bodies and internal strainer |
| drb setpoint adjustment | Downstream pressure is set by turning an adjustment screw that increases or decreases spring force above a diaphragm |
| drc size connections | 1/2", 3/4", 1", 11/4" * Connections NPT, SW, 150# & 300# FLG |
| drc body material | Stainless Steel CF8M Seat & Disc Hardended 420 Stainless Steel |
| drc pressure envelope | Max Inlet Pressure 300 PSIG Min Inlet Pressure 15 PSIG Max Differential Pressure 125 PSI Min Differential Pressure 15 PSI |
| drc rating | NPT: 300 PSIG @ 450 F 150# FLG 195 PSIG @ 400 F 300# FLG 300 PSIG @ 450 F |
| drc no sensing line | This style of regulator does not require an external sensing line |
| drc strainer integral | Integral stainless steel strainer on 1" and 11/4" only |
| drc seat hardness | Hardened stainless steel seat and disc for extended service life (55 Rc) |
| drc diaphragm steam | Stainless Steel Diaphragms are offered for steam service |
| drc diaphragm liquid | designed for water, air, gases and other liquid service and have a working temperature range up to 300F |
| drc spring range example | 0-10 OSS-12-N-13-S OSS-12-N-13-V 10 1/2" 10-50 |
| drd outlet ranges | 357 28-85 56 1339 (1338) 357 80-140 80 |
| drd lead free cert | less than 0.25% of lead by weight and be certified to NSF/ANSI 372 |
| drd asse standard | Pressure reducing valve shall comply with ASSE Standard 1003 |
| drd construction | a bronze valve cover threaded to a brass body, pressure adjustment screw, 416 stainless steel floating seat, EPDM seal with Elastomeric diaphragm and internal stainless steel strainer (1000 micron) |
| drd union connections | double union end connections |
| drd water temperature | accept water temperatures up to 158F |
| drd gauge ports | Pressure gauge port standard on both sides |
| drd y strainer advice | recommended to install a Y strainer upstream of the pressure reducing valve |
| Combined body/bonnet material list | Ductile Iron (EN1563 EN-GJS-450/10) |
| flanged size range | DN50 to DN150 (sizes: DN50, DN65, DN80, DN100, DN125, DN150) |
| outlet pressure ranges | 1.5-6 bar, 5-12 bar, 12-24 bar |
| valve weight | 12 to 74 kg across DN50 to DN150 (12/19/24/34/56/74 kg by size) |
| threaded size range | G1/2" to G2" (DN15 to DN50): 15(1/2"), 20(3/4"), 25(1"), 32(1-1/4"), 40(1-1/2"), 50(2") |
範囲と出所の注記
| set range envelope | Set-range envelope: tenant downstream band is 1.5-6 bar, while the referenced threaded execution spans 1-13 kgf/cm2 (about 1-12.7 bar) and the diaphragm flanged execution 2-5 kgf/cm2 (about 2-4.9 bar) - the tenant band sits between the two executions and relies on spring selections not evidenced on either page. |
|---|---|
| temperature envelope | Temperature envelope: tenant -10 to 70°C (EPDM seal) vs the referenced executions at 0-60°C - the tenant lower bound depends on the EPDM build rather than the referenced pages. |
| response framing | Response framing: simplicity/quick-response positioning vs pilot-operated capacity - direct-acting is the low-to-moderate load choice; the referenced industry guide also credits stable performance across varying flows, which does not remove the droop characteristic inherent to spring-diaphragm direct action. |
| construction detail split | Construction detail split: generic three-element framing (port/spring/diaphragm) vs the tenant ductile-iron body with stainless trim - material execution is tenant-specific and not covered by the referenced mechanism descriptions. |
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
直動式減圧弁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。
直動式減圧弁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。
直動式減圧弁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。
直動式減圧弁 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。