進(jìn)口不銹鋼法蘭閘閥，白鋼閘閥源于其切斷流體的構(gòu)造，安裝在閥體內(nèi)部的圓盤狀閥板（閥芯），相對于管道和流體上下垂直運(yùn)動(dòng)，進(jìn)行開閉。是一種利用了閥板的楔形結(jié)構(gòu)來阻止流體的構(gòu)造 RETZ The stainless steel flange gate valve originates from its structure of cutting off fluid. The disc valve plate (valve core) installed inside the valve body moves vertically up and down relative to the pipeline and fluid for opening and closing. It is a structure that uses the wedge structure of the valve plate to stop the fluid

進(jìn)口不銹鋼法蘭閘閥，白鋼閘閥性能描述 Performance description

產(chǎn)品采用標(biāo)準(zhǔn)Technical Specification

設(shè)計(jì)標(biāo)準(zhǔn)Design standard：EN 1984、DIN 3352/API 600、BS 1414

結(jié)構(gòu)長度Structuralength：DIN 3202、EN 558-1/ASME B16.10

連接法蘭Flanged ends：EN1092-B1/API 598、API 6D、BS 6755

試驗(yàn)和檢驗(yàn)Test & inspection：EN12266、DIN 3352 Part 1、DIN 3230 Part 3/ASME B16.34

適應(yīng)溫度Applicable temperature ：-29~350℃

公稱壓力 Nominal pressure：16-6.4Mpa，CL150-300LB

規(guī)格尺寸 size：1/2~12”

結(jié)構(gòu)特點(diǎn) 

閥蓋墊片形式Gasket of Cover Flange

Class150閘閥采用不銹鋼石墨復(fù)合墊片；Class300閘閥采用不銹鋼石墨纏繞墊片；Class600閘閥可用不銹鋼石墨纏繞墊片也可采用金屬環(huán)墊片；Class900閘閥可采用金屬環(huán)墊片；Class1500~Class2500閘閥采用自壓密封金屬環(huán) retz品牌 Carbon steel or stainless steel + flexible graphite combined gasket is used for Class 150 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 600 gate valve, and ring joint gasket is also optional for Class 600 gate valve; Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class 1500~Class 2500 gate valve.

●填料密封Packing Seal

通常采用柔性石墨作為填料材料，可根據(jù)用戶需求提供PTFE或者復(fù)合填料材料。填料與填料函接觸的表面粗糙3.2 μm，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(jī)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 conhbined 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 m). The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness(Ra 0.8 u m)and ensure the reliable tightness of the stem area.

●閥體和閥蓋連接形式 Body and Bonnet Connection

Class150~Class900采用栓接閥蓋；Class1500~Class 2500采用自壓密封式閥蓋。

The body and bonnet of Class 150~Class 900 gate valves are usually connected with studs and nuts. And the body and bonnet of Class 1500~Class 2500 gate valves are usually of pressurized seal design.

●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 packing impacting system can be adopted for enhancing the durability and reliability of the packing seal.

●倒密封設(shè)計(jì)Back Seating Design

RETZ提供的所有角閥都有倒密封設(shè)計(jì)，通常情況下，碳鋼閘閥的閥座設(shè)計(jì)采用分離式倒密封結(jié)構(gòu)，不銹鋼閘閥的倒密封是直接加工或者是焊后加工。當(dāng)閥門在全開位置時(shí)，倒密封的密封面非?？煽?。雖然按照標(biāo)準(zhǔn)APIG00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 gate valves have the back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat. For stainless steel gate valve, the back seat is machined directly in the bonnet or ismachined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable, However, as per the redquirement of API 600, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.

●閥桿設(shè)計(jì)Stem Design

采用整體鍛造工藝制成，按照標(biāo)準(zhǔn)要求確定最小直徑，閥桿和閥瓣采用T型結(jié)構(gòu)連接。閥桿結(jié)合面的強(qiáng)度大于閥桿T型螺紋部分的強(qiáng)度試驗(yàn)按照API591進(jìn)行。

The stem is of integral forged design. The minimum diameter of the sterm shall per the standard requirement. The connection of the stem and disc is T type. The strength of the connecting area is bigger than thatof the T threaded part of the stem. The strength test of that area conforms to API 591.

●閥桿螺母Stem Nut

通常情況下，閥桿螺母材料采用ASTM A439 D2?？梢愿鶕?jù)用戶要求采用銅合金等材料，對于大口徑的閘閥（NPS≥10'Class150；NPS≥8'Class300；NPS≥6℃lass600；NPS≥5℃lass900），閥桿螺母和閥桿之間設(shè)計(jì)有滾動(dòng)軸承，可以有效減小閘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 macde of copper ally if being requested by the customer. For large sized gate valves (NPS 10 for Class 150, NPS 8 for Class 300, NPS 6 for Class 600, NPS 5 for Class 900), rolling bearing is fitted at the two sides of the stem nut in order to minimize the open and close torque of the gate valve.

●閥座Seat

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，NPS410”的閘閥采有分離式螺紋旋入式閥座，如果用戶需要焊閥座結(jié)構(gòu)也可提供；NPS≥121間閥采用焊閥座結(jié)構(gòu)；不銹鋼閘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，不銹鋼閘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 gate valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS≤10 gate valves, and welded on seat can be also optional if being requested by the customer Welded on seat is used for NPS≤12 carbon steel gate valves. For Stainless steel gate valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel gate valve if being requested by the customer.

●特殊閘閥 Special Gate Valve

除通用閘閥外，我們公司還可以提供低溫閘閥、波紋管閘閥、夾套閘閥，地下安裝的加長閥桿閘閥等等。

Besides the common gate valves, Our company's also makes cryogenic gate valve, Jacketed Gate Valve, Bellow Sealed Gate Valve, EXtension Stem Gate Valve for underground application, etc.

主要零部件材料 Main parts and materials