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進口天然氣減壓閥
一、進口天然氣減壓閥產(chǎn)品概述
品牌：美國歐可OKE
進口天然氣減壓閥，也叫天然氣調(diào)壓閥（Gas pressure reducing valve）是指用于天然氣管道系統(tǒng)，通過調(diào)節(jié)彈簧壓力設(shè)定出口壓力、利用膜片傳感出口壓力變化，通過導(dǎo)閥啟閉驅(qū)動活塞調(diào)節(jié)主閥節(jié)流部位過流面積的大小，實現(xiàn)減壓穩(wěn)壓功能。從流體力學(xué)的觀點看，減壓閥是一個局部阻力可以變化的節(jié)流元件，即通過改變節(jié)流面積，使流速及流體的動能改變，造成不同的壓力損失，從而達到減壓的目的。然后依靠控制與調(diào)節(jié)系統(tǒng)的調(diào)節(jié)，使閥后壓力的波動與彈簧力相平衡，使閥后壓力在一定的誤差范圍內(nèi)保持恒定。

二、進口天然氣減壓閥產(chǎn)品特征
1、廣泛用于氣體管路，如空氣、氮氣、氧氣、氫氣、液化氣、天然氣等氣體。
2、屬于先導(dǎo)活塞式減壓閥。由主閥和導(dǎo)閥兩部分組成。主閥主要由閥座、主閥盤、活塞、彈簧等零件組成。導(dǎo)閥主要由閥座、閥瓣、膜片、彈簧、調(diào)節(jié)彈簧等零件組成?？刂凭_。
3、通過調(diào)節(jié)調(diào)節(jié)彈簧壓力設(shè)定出口壓力、利用膜片傳感出口壓力變化，通過導(dǎo)閥啟閉驅(qū)動活塞調(diào)節(jié)主閥節(jié)流部位過流面積的大小，實現(xiàn)減壓穩(wěn)壓功能。進口壓力不斷變化的情況下，保持出口聽壓力和溫度值在一定的范圍內(nèi)

三、進口天然氣減壓閥技術(shù)參數(shù)及性能
公稱壓力(Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
殼體試驗壓力(Mpa)* 2.4 3.75 6.0 9.6 15.0 24
密封試驗壓力(Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
進口壓力(Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
出口壓力范圍(Mpa) 0.1-1.0 0.1-1.6 0.1-2.5 0.5-3.5 0.5-3.5 0.5-4.5
壓力特性偏差(Mpa)△P2P ANSI2365，GB12246-1989
流量特性偏差(Mpa)P2G ANSI3568，GB12246-1989
最小壓差(Mpa) 0.15 0.15 0.2 0.4 0.8 1.0
滲漏量 X/F(聚四氟乙稀/橡膠)：O滲漏 Y(硬密封)：按ANSI6863

四、進口天然氣減壓閥額定流量系數(shù)
DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 500
Cv 1 2.5 4 6.5 9 16 25 36 64 100 140 250 400 570 780 1020 1500

五、進口天然氣減壓閥主要零件材料
零件名稱零件材料
閥體閥蓋底蓋 WCB/FCB*
閥座閥盤 2Cr13/304*
缸套 2Cr13/25(鍍硬鉻)/304*
活塞 2Cr13/銅合金/銅合金*
活塞環(huán) 合金鑄鐵/對位聚苯*
導(dǎo)閥座導(dǎo)閥桿 2Cr13/304*
膜片 1Cr18Ni9Ti
主閥導(dǎo)閥彈簧 50CrVA
調(diào)節(jié)彈簧 60Si2Mn
密封墊(X/F/Y) 橡膠/聚四氟乙稀/硬質(zhì)合金
導(dǎo)閥體導(dǎo)閥蓋 25/304*

六、進口天然氣減壓閥安裝說明
1、氣體減壓閥安裝必須嚴格按照閥體上的箭頭方向保持和流體流動方向一致。如果氣體不清潔含有一些雜質(zhì)，必須在減壓閥的上游進水口安裝過濾器(我們建議過濾精度不低于0.5mm)。
2、為了操作和維護方便，氣體減壓閥一般直立安裝在水平管道上。
3、為了防止氣體減壓閥閥后壓力超壓，應(yīng)在離閥出口不少于4M處加裝一個減壓閥。
4、減壓閥閥前和閥后必須裝截止閥，更換或者維修時開關(guān)氣體用
5、氣體如果有冷凝水的話，需要裝汽水分離器，防止冷凝水對減壓閥活塞或者膜片的損壞。

七、進口天然氣減壓閥業(yè)績
公司，公司，英荷殼牌石油公司，西門子股份公司，廣東華南特種氣體研究所有限公司，通用電氣公司，北京桑翌實驗儀器研究所杭州同益氣體研究所,哈爾濱工業(yè)大學(xué)，江蘇天瑞儀器股份有限公司，長沙開元儀器股份有限公司，比亞迪股份有限公司，美國德州儀器，瓦萊羅能源公司，惠州市方舟工業(yè)氣體有限公司，江蘇通廣石化工業(yè)氣體有限責任公司，杭州三泰工業(yè)氣體設(shè)備有限公司

Imported natural gas pressure reducing valve
I. Overview of imported natural gas pressure reducing valve products
Brand: US Ouke OKE
The imported natural gas pressure reducing valve, also called the gas pressure reducing valve, is used for the natural gas pipeline system. The outlet pressure is set by adjusting the spring pressure, and the outlet pressure of the diaphragm is sensed by the diaphragm. The piston adjusts the size of the flow area of ??the throttle portion of the main valve to realize the pressure reduction and voltage stabilization function. From the point of view of fluid mechanics, the pressure reducing valve is a throttling element whose local resistance can be changed, that is, by changing the throttling area, the flow velocity and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of decompression. Then, relying on the adjustment of the control and regulation system, the fluctuation of the post-valve pressure is balanced with the spring force, so that the post-valve pressure remains constant within a certain error range.

Second, the characteristics of imported natural gas pressure reducing valve
1. Widely used in gas pipelines such as air, nitrogen, oxygen, hydrogen, liquefied gas, natural gas and other gases.
2. It belongs to the pilot piston type pressure reducing valve. It consists of two parts: the main valve and the pilot valve. The main valve is mainly composed of a valve seat, a main valve disc, a piston, a spring and the like. The pilot valve is mainly composed of a valve seat, a valve disc, a diaphragm, a spring, an adjustment spring and the like. Control is precise.
3. Adjust the outlet pressure by adjusting the spring pressure, and use the diaphragm to sense the outlet pressure change. The pilot valve is opened and closed by the pilot valve to adjust the overflow area of ??the throttle portion of the main valve to realize the pressure reduction and voltage stabilization function. Keeping the outlet listening pressure and temperature within a certain range when the import pressure is constantly changing

Third, imported natural gas pressure reducing valve Technical parameters and performance
Nominal pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
Shell test pressure (Mpa)* 2.4 3.75 6.0 9.6 15.0 24
Seal test pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
Maximum import pressure (Mpa) 1.6 2.5 4.0 6.4 10.0 16.0
Outlet pressure range (Mpa) 0.1-1.0 0.1-1.6 0.1-2.5 0.5-3.5 0.5-3.5 0.5-4.5
Pressure characteristic deviation (Mpa) △ P2P ANSI 2365, GB12246-1989
Flow characteristic deviation (Mpa) P2G ANSI3568, GB12246-1989
Minimum differential pressure (Mpa) 0.15 0.15 0.2 0.4 0.8 1.0
Leakage X/F (polytetrafluoroethylene/rubber): O leakage Y (hard seal): according to ANSI 6863

4. Imported natural gas pressure reducing valve
DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 500
Cv 1 2.5 4 6.5 9 16 25 36 64 100 140 250 400 570 780

5. Imported natural gas pressure reducing valve Main parts and materials
Part Name Part Material
Body bonnet bottom cover WCB/FCB*
Seat valve disc 2Cr13/304*
Cylinder liner 2Cr13/25 (hard chrome plating)/304*
Piston 2Cr13/copper alloy/copper alloy*
Piston ring alloy cast iron / para-polyphenyl *
Guide valve seat Guide valve stem 2Cr13/304*
Diaphragm 1Cr18Ni9Ti
Main valve pilot valve spring 50CrVA
Adjustment spring 60Si2Mn
Seal (X/F/Y) Rubber / Polytetrafluoroethylene / Hard Alloy
Pilot valve body Guide valve cover 25/304*

Sixth, the installation instructions for imported natural gas pressure reducing valve
1. The gas pressure reducing valve must be installed in strict accordance with the direction of the arrow on the valve body and the direction of fluid flow. If the gas is not clean and contains some impurities, the filter must be installed at the upstream inlet of the pressure reducing valve (we recommend a filtration accuracy of not less than 0.5mm).
2. For ease of operation and maintenance, the gas pressure reducing valve is generally installed upright on a horizontal pipe.
3. In order to prevent pressure overpressure after the gas pressure reducing valve, a pressure reducing valve should be installed at not less than 4M from the valve outlet.
4. The pressure reducing valve must be equipped with a shut-off valve before and after the valve, and the switch gas should be used for replacement or maintenance.
5. If the gas has condensed water, it needs to be equipped with a steam separator to prevent the condensate from damaging the piston or diaphragm of the pressure reducing valve.

Seven, the performance of imported natural gas pressure reducing valve
China National Petroleum Corporation, China Petrochemical Corporation, Anglo Royal Shell Oil Company, Siemens AG, Guangdong Huanan Special Gas Research Institute Co., Ltd., General Electric Company, Beijing Sangqi Experimental Instrument Research Institute, Hangzhou Tongyi Gas Research Institute, Harbin Institute of Technology, Jiangsu Tianrui Instrument Co., Ltd., Changsha Kaiyuan Instrument Co., Ltd., BYD Co., Ltd., Texas Instruments, Valero Energy, Huizhou Fangzhou Industrial Gas Co., Ltd., Jiangsu Tongguang Petrochemical Industrial Gas Co., Ltd. Company, Hangzhou Santai Industrial Gas Equipment Co., Ltd.