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水用減圧弁
水用減圧弁は建物給湯給水・消火・配水網で二次圧を固定値に保ち、受水槽直送や加圧ポンプがもたらす高い一次圧から器具やメーターを保護します。範囲は鋳鉄・鋳鋼・ダクタイル鋳鉄ボディ+ステンレス鋼シート・ピストン・リング・スリーブ、DN20～DN400、PN16～PN64またはClass 150～2500。選定はPN/クラス帯に対する管径と圧力クラス、水質に対するステンレス湿潤トリム、日間需要変動に対する流量範囲がポイントです。水道系資料は飲料水用途の枠組み（引込口配置、メーター-配水間の役割）、被害・浪費低減の効果、流向矢印による据付規則、住宅用のカートリッジと一体型バイパス機能、住宅用設定帯25～75psiと工場出荷プリセット50psi、ASSE 1003/NSF 61およびBS EN 1567の規格枠を補足します。
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
| Nominal valve connection size | DN20 to DN400 |
|---|---|
| Pressure class / nominal rating designation | PN16 to PN64, Class150 to Class2500 |
| Pressure class / nominal rating designation | Class150 to Class2500 |
| Valve body material | Cast Iron, Cast Steel, Ductile Iron |
| Seat material | Stainless Steel |
| piston materials | Stainless Steel |
| ring materials | Stainless Steel |
| sleeve materials | Stainless Steel |
| residential scope | Designed for potable water lines: reduces high inlet pressure to a lower outlet pressure |
| replaceable cartridge | Unitized replaceable cartridge shortens cleaning and maintenance time |
| thermal expansion bypass | Direct-acting integral bypass prevents excessive system pressure from thermal expansion |
| balanced piston response | Balanced piston design reacts smoothly to flow-demand changes and shields outlet from inlet pressure changes |
| reduced pressure range residential | 25-75 psi reduced pressure range with 50 psi typical factory preset (residential brass execution) |
| residential standards | ASSE 1003 listed; NSF/ANSI 61 drinking-water requirements met (lead-free residential execution) |
| integral strainer option | 20-mesh strainer screen available integral to the inlet union |
| fixture protection benefit | Properly adjusted PRVs prevent high-pressure damage and enhance plumbing-system safety |
| maintenance benefit | Lower pressure reduces strain on pipes and fixtures, cutting maintenance cost and extending system life |
| water wastage reduction | Prevents leaks and bursts in pipes, significantly reducing water wastage |
| installation orientation | Install with the flow-direction arrow toward the fixtures; secure with union fittings |
| service connection definition | On private premises the PRV sits in the service connection and reduces potable-water pressure before the private system |
| meter placement | Commonly installed between the meter and the distribution system to hold pressure within the code high-pressure limit |
| drinking water standard | Product standard expectation for drinking-water supply: BS EN 1567:2000 or equivalent |
| wpa supply pressure limit | up to 300psi (20.7 bar) |
| wpa in line serviceability | serviceable without removing the valve from the line |
| wpa thermal bypass function | the flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main supply |
| wpa bypass hot water limit | will not prevent the pressure relief valve from opening on the hot water supply system with pressure above 150psi (10.3 bar) |
| wpa water savings case | reducing the supply pressure from 80-50psi (551-345 kPa) resulted in a water savings of 30% |
| wpa install trigger threshold | supply main pressure exceeds 60psi (413 kPa) |
| wpa material schedule | Body: Lead Free* cast copper silicon alloy Seat: Thermoplastic Cage: Thermoplastic Integral Strainer: Stainless steel Diaphragm: Reinforced EPDM Valve Disc: EPDM |
| wpa temperature range | 33F 180F (0.5C 82C) |
| wpa standards listing | ASSE Standard 1003; (ANSI A112.26.2); CSA Standard B356; and listed by IAPMO |
| wpa lead free wetted limit | contains less than 0.25% of lead by weight |
| wpb nominal diameter | DN15~DN50 |
| wpb design standards | ASSE 1003, ANSI A2.26.2, CSAB356, IAPMO |
| wpb connection standard | NPT to ASME B1.20.1 |
| wpb working medium | Water |
| wpb m1 max pressure | 400psi(2.76MPa) |
| wpb dn32 50 max pressure | 300psi(2.07MPa) |
| wpb two stage rule | two-stage pressure reduction is recommended by adding PRV in series |
| wpc downstream setting range | 15 - 90 psi (100 - 600 kPa) |
| wpc factory setting | 45 psi (300 kPa) |
| wpc max working pressure | 300 psi (2000 kPa) |
| wpc body material | DZR low-lead forged brass CR EN 1982 CC768S |
| wpc seat material grade | EN 10088-3 (AISI 303) |
| wpc certification set | ASSE 1003/CSA B356, NSF/ANSI/CAN 61 (180F/82C Commercial Hot), NSF/ANSI/CAN 372 |
| wpc function definition | reduce and stabilize the pressure of the water entering from the water supply main |
| wpd parallel bypass logic | install two pressure reducing valves in parallel (by-pass) to ensure a stable downstream pressure, even at low flow rates |
| wpd low flow instability | unstable resulting in erratic behaviour at low flow rates |
| wpd compensated seat behavior | the setting pressure remains constant regardless of variations in the upstream pressure |
| wpd diaphragm control trait | Very sensitive to pressure variations; Responsive and accurate control |
| wpd piston first stage trait | stresses (pressure changes or water hammer); Suitable for first-stage installation |
| wpd downstream pipe length limit | limit the length of the pipes downstream of the pressure reducing valves |
| flow cv | DN15=1, DN20=2.5, DN25=4, DN32=6.5, DN40=9, DN50=16, DN65=25, DN80=36, DN100=64, DN125=100, DN150=140, DN200=250, DN250=400, DN300=570, DN350=780, DN400=1020, DN500=1500 |
範囲と出所の注記
| size class envelope | Size/class envelope: tenant DN20-DN400 PN16-PN64/CL150-2500 vs the referenced residential brass execution at 25-75 psi outlet with ~140F water - the residential plumbing execution is far below the tenant industrial band; both are water-PRV products but not interchangeable. |
|---|---|
| temperature ceiling | Temperature ceiling: referenced residential execution tops at 140F (180F with CPVC tailpiece at reduced pressure), while the tenant temperature limits are set by elastomer/trim selection at industrial service - envelope is execution-specific. |
| response design split | Response design split: balanced-piston smooth-response framing (plumbing regulator) vs the tenant stainless piston/ring/sleeve industrial build - the balanced-piston benefit is not automatically transferable to the tenant execution. |
| standard layering | Standard layering: code/utility definitions expect BS EN 1567 (or equivalent) for drinking-water supply, while the referenced residential execution is ASSE 1003/NSF 61 - market-dependent product standards, not one universal certificate. |
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
水用減圧弁はどのような材質で提供されますか？
公開仕様にはsleeve materials：Stainless Steelが記載されています。特定のサイズ・圧力等級での材質の供給可否は見積時に確認します。
水用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。
水用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。
水用減圧弁 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。