冷凝器和管線控制閥冷卻水閥門選型 |
作者: 來源: 閱讀次數:598 |
通徑DN65以上的管線控制閥 LINE CONTROL VALVES 2 1/2” AND LARGER 蝶閥: BUTTERFLY VALVES: 這類閥門應該是凸耳或國際管道標準I.P.S.管狀連接端口閥體,并按照美國閥門和管件制造商標準化協會MSS-SP67標準制造;通徑DN50~DN300額定工作壓力是200 psi非沖擊冷水,DN350以上是150 psi。用于保溫隔熱絕緣的閥體具有2英寸的加長管徑,材質是鑄鐵或球墨鑄鐵。蝶板材質是鋁青銅合金,配置三元乙丙橡膠閥座和密封;或三元乙丙橡膠涂層蝶板,配置聚合物涂層閥體。閥桿應該是400系列不銹鋼,不能將閥桿暴露在蝶板緊固件上。通徑DN65至DN150應該配置具有10個位置節流板的操作手柄;通徑DN200以上的蝶閥應該配置齒輪操作機構。凸耳結構和管狀結構蝶閥應該能夠用作隔斷閥,而且不需要下游法蘭也可以在全壓力下用在管道終端。 Valves shall be lug or I.P.S. grooved body style manufactured in accordance with MSS-SP67; 2"- 12" rated at least 200 psi non-shock cold water working pressure, 14" and larger rated at 150 psi. Body to have 2" extended neck for insulating and to be cast iron or ductile iron. Valve to have aluminum bronze alloy disc with EPDM rubber seat and seals; or EPDM rubber encapsulated disc with polymer-coated body. Stem shall be 400 series stainless steel and shall not have exposed stem to disc fasteners. sizes 2 1/2"-6" shall be lever operated with 10-position throttling plate; sizes 8" and larger shall have gear operators. Lug-style and grooved style shall be capable for use as isolation valves and recommended by manufacturer for dead-end service at full pressure without the need for downstream flanges. 可采用的閥門: 凸耳閥體,鋁青銅蝶板的美國尼伯科LD2000-3蝶閥(手柄操作機構);LD2000-5蝶閥(齒輪操作機構);LD1000-5蝶閥(齒輪操作機構),通徑DN350以上。 管狀閥體,橡膠涂層蝶板的美國尼伯科GD4765-3蝶閥(手柄操作機構);GD4765-5蝶閥(齒輪操作機構) ACCEPTABLE VALVES: Lug body, aluminum bronze disc NIBCO LD2000-3 (lever operator); LD2000-5 (gear operator); LD1000-5 (gear operator) 14" and larger Grooved body, rubber-coated disc NIBCO GD4765-3 (lever operator); GD4765-5 (gear operator) 閘閥,截止閥/角閥: GATE, GLOBE/ANGLE VALVES: 這些閥門工作壓力為125磅級,并按照美國閥門與管件制造商標準化協會MSS-SP70(閘閥)標準或MSS-SP85(截止閥/角閥)標準制造,法蘭連接,螺栓閥蓋,OS&Y,鑄鐵閥體,青銅閥內件,閥體和閥蓋材質符合美國材料試驗協會ASTM A 126級別B標準鑄鐵,填料和襯墊不含石棉。 Valves to be Class 125 manufactured in accordance with MSS-SP70 (gate) or MSS-SP85 (globe/angle), flanged, bolted bonnet, OS&Y, iron body, bronze trimmed, with body and bonnet conforming to ASTM A 126 Class B cast iron. Packing and gaskets to be non-asbestos. 可采用的閥門: 美國尼伯科F-617-O閘閥 美國尼伯科F-718-B截止閥 美國尼伯科F-818-B角閥 ACCEPTABLE VALVES: Gate NIBCO F617-0; Globe NIBCO F718-B; Angle NIBCO F818-B 止回閥: CHECK VALVES: 通徑DN65以上的止回閥應該采用旋啟式結構,并按照美國閥門和管件制造商標準協會MSS-SP71標準制造,125磅級,法蘭連接,符合美國材料試驗協會ASTM A 126級別B標準的鑄鐵閥體和青銅閥內件,不含石棉的襯墊。也可以采用平板式結構,配置不銹鋼彈簧,青銅閥瓣,橡膠閥座,符合美國材料試驗協會ASTM A 126級別B標準的或A 48標準的鑄鐵閥體,配置125磅級或150磅級法蘭。彈簧執行機構止回閥用于管道排放。外置操作手柄和彈簧執行機構的旋啟式止回閥用于污水坑、排污和雨水排泄管道。 2 1/2" and larger shall be swing-type manufactured in accordance with MSS-SP71, Class 125, flanged ASTM A 126 Class B cast iron body with bronze trim, non-asbestos gasket. Or wafer-style with stainless steel spring, bronze disc plates, rubber seat, body of cast iron ASTM A 126 Class B or A 48 for use with Class 125/150 flanges. Spring-actuated valve to be used on pump discharge. Swing check with outside lever and spring to be used on sump, sewage and storm drain lines. 可采用的閥門: 旋啟式美國尼伯科F-918-B止回閥 彈簧執行機構平板式美國尼伯科W-920-W或KW-900-W止回閥,或外置手柄和彈簧的W-910-W旋啟式止回閥,或配置重力拉桿的美國尼伯科F-918-BL&S或F-918-BLW止回閥 ACCEPTABLE VALVES: Swing-type NIBCO F918-B Spring-actuated wafer-type NIBCO W920-W or KW900-W or W910-W Swing-type with outside lever and spring or weight, NIBCO F918-BL&S or F918-BLW 流量平衡閥門: CIRCUIT BALANCING VALVES: 用于熱水和冷水管道系統的通徑DN15至DN50流量平衡閥應該以美國尼伯科型號1710為基礎,而通徑DN50至DN300應該以美國尼伯科型號737為基礎。通徑DN15至DN50閥門的材質應該是抗失鋅現象的黃銅或青銅。通徑DN50至DN300閥門的材質是鑄鐵,配置美國國家標準化組織(ANSI)125磅級/150磅級法蘭或管狀連接端口。對于需要精確調節和控制流量的場合,所采用的閥門應該是截止閥結構,壓力-溫度等級為121oC,175 psi時采用鑄鐵材質,壓力-溫度等級為121oC,240 psi時采用青銅材質。每個閥門應該配置兩個測試端口,內置止回閥和保護閥蓋。所有流量平衡閥均配置可視位置讀數指示器,并內置操作位置記憶裝置,用于重復調節和控制。 Valves for heating and chilled water service shall be based on NIBCO Figure 1710, 1/2" to 2" and NIBCO Figure 737 2" to 12". 1/2" to 2" valves shall be constructed of dezincification resistant brass or bronze alloy. 2" to 12" valves will be constructed of iron with ANSI Class 125/150 flanged or grooved ends. All valves shall be globe style for precise regulation and control and rated 175 psi for Iron and 240psi for Bronze at 250°F. Each valve shall have two metering/test ports with internal check valve and protective caps. All valves must be equipped with visual position readout and memory stop for repeatable regulation and control. 可采用的閥門 美國尼伯科T-1710流量平衡閥(螺紋);S-1710流量平衡閥(焊接) 美國尼伯科F-737流量平衡閥(法蘭);G-737(管狀) ACCEPTABLE VALVES: NIBCO T1710 (threaded); S1710 (solder) NIBCO F737 (flanged); G737 (grooved) |