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直接作用式減壓閥
直接作用式減壓閥在單一緊湊閥體內以設定彈簧平衡下游壓力，無需先導管路或外部感測——簡單的響應適合空氣、水與輕製程管線上穩定、適中的負荷。產品範圍涵蓋球墨鑄鐵（EN-GJS-450/10）閥體與閥蓋，不鏽鋼閥座、軸套與緊固件，55SiCr6 鋼設定彈簧與 EPDM 密封，上游 PN16 或 PN40，下游範圍 1.5 至 6 bar。選型取決於下游設定點區間、需求波動下的流量穩定性，以及彈性體與彈簧材料的溫度極限。機理資料補充單行程力平衡（設定彈簧與單膜片上下游壓力的對抗）、設定點關閉響應、結構要素（進出口、彈簧、感測膜片）、相較先導式排量的快速響應定位、市政供水任務，以及引用結構包絡（1-13 kgf/cm2 螺紋；2-5 kgf/cm2 膜片法蘭，均 0-60°C）與水平或垂直安裝。
屬於 減壓閥 系列
最後更新： 2026-11
系列規格
| 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") |
範圍與來源備註
| 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. |
訂購與文件
文件
請在詢問時一併說明您需要的文件組合——此結構的常見項目（材質證明、按所列檢驗標準的測試報告、尺寸圖）將於報價時確認並隨附供應。
報價
可直接報價的詢問應說明：公稱口徑與壓力額定、閥體與閥座材質偏好、端部連接、操作方式，以及含溫度的使用介質。本頁的典型值為基準參考範圍；具有約束力的數值於報價時確認。
樣品與供應
供應條件、訂購數量與交期按訂單議定——請在詢問時說明目的地國家與所需時程。
儲存與運輸
閥門儲存時應保護閥座與密封件免受紫外線、臭氧與變形影響，安裝前保留端面保護蓋；彈性體或 PTFE 閥座結構應避免長期戶外存放——閥座材料在陽光直射與冰凍條件下老化最快。
常見問題
直接作用式減壓閥的報價詢問應包含哪些內容？
執行標準與壓力等級、公稱口徑、閥體與閥座材質、介質及溫度、目的地——缺失的資訊會在報價過程中確認。
直接作用式減壓閥提供哪些口徑與壓力等級？
本頁面尚未公布該閥門經驗證的口徑與壓力等級範圍——適用於您工況的口徑與壓力等級會在報價過程中提出並確認。請在詢問時附上工況條件，選型結果會在報價中說明。
直接作用式減壓閥提供哪些閥體材質？
本頁面尚未公布該閥門經驗證的閥體材質範圍——適用於您工況的閥體材質會在報價過程中提出並確認。請在詢問時附上工況條件，選型結果會在報價中說明。