進口不銹鋼法蘭截止閥，節(jié)流閥性能描述 Performance description

不銹鋼法蘭截止閥(節(jié)流閥)閥桿軸線與閥座密封面垂直。閥桿開啟或關(guān)閉行程相對較短，并具有非常可靠的切斷動作 RETZ The axis of the stainless steel stop valve (throttle valve) stem is perpendicular to the sealing surface of the valve seat. The opening or closing stroke of the valve rod is relatively short, and it has a very reliable cut-off action

閥瓣一旦處于開啟狀況，閥座和閥瓣密封面之間就不再的接觸，并具有非常可靠的切斷動作，適合作為介質(zhì)的切斷或調(diào)節(jié)及節(jié)流使用 Once the valve clack is open, there is no contact between the valve seat and the sealing surface of the valve clack, and the valve clack has a very reliable cutting action, which is suitable for cutting off or regulating the medium and throttling

設(shè)計制造Design and Manufacture∶ BS1873 or ASME B16.34 

檢驗與試驗 Inspection and Test∶ API 598 

法蘭連接尺寸End flange dimension∶ ASME B16.5 

對焊端BWend dimension∶ ASMEB16.25

承插焊端 Socket-weld dimension∶ ASME B16.11 

結(jié)構(gòu)長度Facetoface and end to end∶ ASME B16.10 

高壓等級Pressure-temperatureratings∶ASMEB16.34

規(guī)格尺寸 Size : 1/2～12"

公稱壓力 Nominal pressure：PN16～100、CL150～600LB

適應溫度 Applicable temperature ：-40～500℃

進口不銹鋼法蘭截止閥，節(jié)流閥結(jié)構(gòu)特點 The Features

●閥桿設(shè)計Stem Design

采用整體鍛造工藝制成，按照標準要求確定最小直徑。The stem is of integral forged design. The minimum dianeter of the stem shall per the standard requirement.

●彈簧加載填料沖擊系統(tǒng)Belleville Spring Loaded Packing Impacting System

如果客戶要求，可采用彈簧加載填料沖擊系統(tǒng)提高填料密封的持久性和可靠性 If being requested by the customer, the Belleville spring loaded packng impacting system can be adopted for enhancing the durability and reliability of the packing seal.

●上密封座設(shè)計Back Seating Design

RETZ的截止閉都有倒密封設(shè)計，通常情況下，碳鋼截止閥的閥座設(shè)計采用分離式倒密封結(jié)構(gòu)，不銹鋼截止閥密封是直接加工或者是焊后加工。當閥門在全開位置時，倒密封的密封面非常可靠。雖然按照標準API600中有倒密封，但這不作為在帶壓情況下更換填料的依據(jù)。

All our globe valves have the back seating design. In most cases, the carbon steel globe valve is fitted with a renewable back seat. For stainless steel globe valve, the back seat is machined directly in the bonnet or is machined after welding. When the globe valve is at fully open position, the sealing of the back seat can be very reliable. However, as pelthe requirement of API, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.

●閥座Seat

碳鋼截止閥閥座通常采用鍛鋼材料，閥座密封面可根據(jù)客戶要求噴焊硬質(zhì)合金，NPS≤101的截止閥采用分離式螺紋旋入式閥座，如果用戶需要焊御座結(jié)構(gòu)也可提供；NPS》12'載上閥采用焊御座結(jié)構(gòu)；不銹鋼截止閥的閥座一般采用整體式或者在本體上焊硬質(zhì)合金后直接加工閥座。如果用戶有需求，不銹鋼截止閥閥座也可采用分離式螺紋旋入式和焊接閥座結(jié)構(gòu)。

For carbon steel globe valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the custorner. Renewable threaded seat is used for NPS 4 10 alobe valves, and vwelded on seat can be also optional if being requested by the customer, Welded on seat is used for NPS≥12 carbon steel globe valves. For Staiinless steel globe valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel globe valve if being requested by the customer,

●閥桿螺母StemNut

通常情況下，閥桿螺母材料采用ASTM A439 D2，同時可以根據(jù)用戶要求采用銅合金等材料，對于大口徑的截止閥，裝滾動軸承，可以有效減小截止閥的開啟力矩使閥門可以輕松開關(guān)。

Usually, the stem nut is made of ASTM A439 D2, it is also can be rnade of copper ally if being requested by the customer. For large sized globe valve, rolling bearing is fitted at the two sides of stem nut in order to minimize the open and close torque of the globe valv

●填料密封PackingSeal

通常采用成型柔性石墨作為填料材料，可根據(jù)用戶需求提供PTFE或者復合填料材料。填料與填料函接觸的表面粗糙度為3.2μm，可以保證閥桿與填料接觸面接合緊密但是旋轉(zhuǎn)自如，經(jīng)過精密的機械加工的閥桿密封面粗糙度0.8μm，可以保證閥桿可靠的密封。

Molded flexible graphite is used for packing material. PTFE or combineld packing material can be also used if being requested by the customer. The internal surface of the stuffing box, of which area is contacted with'the packing, is of excellent finish(Ra 3.2 u m). The stem surface, contacting with the packing, should be rolled and pressed after being precisely maachined, so as to reach to the high finish and compactness(Ra 0.8 u m)and ensure the relizble tightness of the stem area.

主要零部件材料 Main parts and materials