系列規格
| Nominal valve connection size | DN20 to DN400 |
|---|---|
| Pressure class / nominal rating designation | PN16 to PN64, ANSI Class 150 to Class 2500 |
| Service temperature range | -10 to 70°C (direct-acting, water), 0 to 80°C (200X, water) |
| End connection types | Flanged (EN 1092) |
| Design standards | ASME B16.34 |
| Inspection and pressure-test standards | API 598 |
| Designs | Direct Acting, Steam, Water, Pilot Operated, Pressure Relief and Sustaining, Float Control |
| Materials (component scope as published) | WCB (ASTM A216), CF8, CF8M (ASTM A351), F316, F316L (ASTM A182), F51/2205 duplex (ASTM A182), F11, F22 (ASTM A182), GG25 cast iron (EN 1561), GGG40, GGG50 ductile iron (EN 1563), C95400, C95800 aluminium bronze (ASTM B148), C83600, LG2 bronze (ASTM B62), CW617N, DZR brass (EN 12165) |
| accuracy behaviour | For pilot-operated steam regulators, set pressure is more stable and varies only a few percent over the full flow range. |
| internals material example | Benchmark pilot-operated steam regulators use all stainless steel internals for high-pressure applications up to 450 PSIG. |
| seat hardness example | Hardened stainless steel seat and disc (55 Rc). |
| size capacity example | Benchmark pilot-operated steam segment: sizes 1/2" to 4", NPT or 150/300 flanged connections, PMO 20 to 450 PSIG, steam capacity to 83,300 lbs/hr. |
| operating principle | A pilot-operated regulator uses a pilot (a small regulator) that senses the outlet pressure and controls the main valve through a pilot line, modulating the pressure on one side of the main valve actuator so the valve opens or closes to maintain the set pressure. |
| selection guidance | Direct-acting regulators suit small-scale applications for their simplicity and cost; pilot-operated regulators serve harsh industrial environments where high flow rates are required. |
| droop definition | Pressure droop is the reduction in the controlled outlet pressure of a pressure reducing regulator as the flow rate increases — an intrinsic characteristic of the internal force-balance mechanism, not a malfunction. Because the regulator is proportional-only in control, the outlet pressure must decrease slightly to re-establish force balance as flow rises; the setpoint is defined at a very low flow rate, just outside the lockup zone. |
| droop mitigation | Droop is reduced by a larger body size with higher Cv capacity, flexible composition diaphragm material, the largest available port size, softer and longer range springs, or pressure-loaded (dome-loaded) designs; pilot-operated regulators with integral "reset" action eliminate steady-state droop altogether. |
| droop typical value example | Benchmark dome-loaded regulator capacity tables are based on 95% accuracy (2 psi minimum droop). |
| pilot setpoint accuracy | Pilot-operated steam regulators hold secondary set pressure within ±0.01 MPa, maintained even when steam load or primary pressure at the valve changes. |
| pilot steam line envelope | Pilot-operated steam line example envelope: PMO 250 psig, TMO 428°F, primary pressure 30-250 psig, secondary pressure 5-210 psig, max flow capacity 47,380 lb/h, cast iron (FC250) body. |
| pilot droop quantified | Pilot-operated regulators: the fall in downstream pressure from fully open to fully closed is typically less than three hundredths of a bar (3 kPa; 0.5 psi). |
| pilot capacity vs direct | A pilot-operated pressure reducing valve will usually be smaller than a direct acting valve of the same capacity. |
| hydronic prv body materials | Hydraulic pilot-operated PRV body and cover material options: ductile iron, cast steel, or bronze. |
| hydronic prv trim materials | Trim (disc guide, seat, cover bearing): bronze standard, stainless steel optional. |
| hydronic prv stem spring | Stem, nut and spring: stainless steel. |
| hydronic prv check feature | With an added check feature, a pressure reversal admits downstream pressure into the main valve cover chamber, closing the valve to prevent return flow. |
| hydronic parallel station | Wide-range reducing stations use two pilot-operated reducing valves in parallel: the larger valve meets peak loads while the smaller handles low flows; a downstream pressure relief valve is recommended for such stations. |
| pilot drip tight closure | When downstream pressure exceeds the control pilot setting, the main valve and pilot valve close drip-tight. |
| anti cavitation trim | Anti-cavitation trim variants exist for high-differential duty: they provide optimum downstream pressure control while reducing cavitation noise and damage, and candidacy is screened with a cavitation guide/chart. |
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
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。
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。
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。
本系列的類型
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