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 螺桿式空壓機進氣閥的工作過程是：啟動、加載、卸載、空調和停機。 

 （1）啟動。電機啟動，主機開始運轉，進氣閥關閉狀態閥芯上的小孔進氣，經過壓縮的油氣進入油氣桶，系統壓力逐漸上升。 

 （2）加載。電機星三角轉換，控制系統會比較系統的實際壓力與設定壓力，當系統壓力低于壓力開關設定下限壓力時，壓力開關動作使加載電磁閥加電，三向電磁閥開啟，向進氣門伺服氣缸供氣推動控制氣缸打開蝶閥，進氣閥全開吸氣；經由電磁閥的壓力同時關閉泄放閥，機器不再放空，罐內壓力持續上升至外向供氣。 

 （3）卸載。當壓力上升到壓差開關上限壓力時，壓差開關發出一個電信號給三向電磁閥，電磁閥關閉停止向進氣門伺服氣缸供氣，控制氣缸不受壓則蝶閥關閉維持小孔進氣，此時受配重控制止回閥能及時迅速的緊密關閉，同時泄放閥打開釋放油氣桶內壓力至基本油壓?？諌簷C處于空載運行，在加載電磁閥連續失電20min后，系統進入空車過久停車狀態。  

（4）容調?？諌簷C加載過程中為減少空壓機的空重負荷次數，安裝有反比例閥，當機組壓力達到壓力開關上限前反比例閥提前動作，減少向伺服汽缸的供氣量，進氣閥伺服汽缸閥桿推力減少，在彈簧力的作用下閥桿回縮，當彈簧力與汽缸的氣體推力平衡時，閥桿處于半開狀態，進氣量減少實現空壓機的容量調節。 

 （5）停機。停機信號來自空車過久或系統壓力長時間處于壓力上限，電機停止，主機停轉不再吸氣，進氣閥的內部止回閥迅速關閉確保沒有停機吐油的現象，泄放閥持續放空至外部大氣壓力。

HOERBIGER賀爾碧格螺桿空壓機進氣閥型號：HDKG40，HDKG50，HDKG65，HDKG85,HDKG120，HDKG160

進氣閥的主要功能是在控制系統作用下調節空氣壓縮機的進氣量，使其與用戶的用氣量保持一個經濟的匹配。
產品使用于瑞典Atlas.Copco（阿特拉斯），美國SULLAIR（壽力）,Ingersoll-Rand（英格索蘭），英國CompAir（康普艾）,日本HITACHI（日立）,KOBELCO（神鋼）,Iwata（巖田）,德國ECOAIR（艾高）,BOGE（寶駒）,KAESER（凱撒）,HANNOVEI（漢諾威）,Lingein（凌格風），臺灣FS（復盛）,柳州LiUTEHCH（富達），昆西Quincy，優耐特unite，聚才JuCai，霸爾BAUER，風霸HYDROVANE，巨霸PUMA，瑪拉MAHLE，三井MITSUISEKI，羅德康普ROTORCOMP，固力GOODAIR，瑪泰MATTEIN，柯龍AIRKRONE，韓信HANSHIN等各類螺桿壓縮機。

Screw air compressor inlet valve working process is: start, loading, unloading, air conditioning and downtime.

(1). To run motor starts, the host, into the holes on the valve closed valve core inlet, compressed gas into the barrels of oil and gas, the system pressure is rising gradually.

(2) load. Star triangle conversion, control system will be the actual pressure and setting, when the system pressure below the pressure switch is set lower limit pressure, pressure switch action make electromagnetic valve, electric load, three-way electromagnetic valve opens, the gas supply to the inlet valve servo cylinder push open the butterfly valve control cylinder, intake valve fully open a breath; Through the electromagnetic valve of the pressure at the same time close the discharge valve, the machine is no longer empty, tank pressure continued to rise to the outgoing air supply.

(3) the unloading. When the pressure rises to the maximum pressure differential pressure switch, pressure differential switch sends an electrical signal to the three-way electromagnetic valve, electromagnetic valve closed stop gas supply to the inlet valve servo cylinder, control cylinder pressure was maintained holes inlet butterfly valve closing, as controlled by the weight check timely quickly tightly closed, open the drain valve at the same time release the pressure in the barrel of oil and gas to basic oil pressure. The no-load operation of the compressor, the load solenoid valve for 20 min after losing electricity, the system enters the empty car parking state too long.

(4) capacity. Air compressor in the loading process to decrease the number of empty heavy load for air compressor, the installation has the inverse proportion valve, when the unit pressure to pressure switch cap of inverse proportion valve in advance before action, reduce the gas, a servo cylinder servo cylinder inlet valve stem thrust reduced, in under the action of spring force stem retraction, when the spring force and the gas cylinder thrust balance, the valve stem is in a state of half open, the volume reduction of air compressor capacity adjustment.

(5) downtime. Stop signal from empty for too long, or the system pressure in pressure for a long time limit, the motor stops, the host stalling no longer breathe in, quickly close internal check valve inlet valve to ensure no downtime the phenomenon of spitting oil, relief valve continued to vent to the outside atmospheric pressure.

HOERBIGER He Erbi screw air compressor inlet valve type: HDKG40, HDKG50, HDKG65, HDKG85, HDKG120, HDKG160

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Intake valve's main function is in the control system under the action of adjust the air inflow of air compressor, to keep its gas with the user a matching of the economy.

Products used in the Atlas Copco (Atlas), American SULLAIR (SULLAIR), Ingersoll Rand (Ingersoll Rand), British CompAir (CompAir), Japan's HITACHI (HITACHI), KOBELCO (steel) god, Iwata (range), Germany ECOAIR (ai), BOGE (easy-on-the-ol), KAESER (Kaiser), HANNOVEI (Hanover), Lingein (insulted thestandard wind), Taiwan FS (fu sheng), liuzhou LiUTEHCH (fidelity), Quincy, Quincy, optimal knight unite, JuCai poly, bully BAUER, wind bully HYDROVANE, big bully PUMA, Myra MAHLE, mitsui MITSUISEKI, Luo Dekang ROTORCOMP, solid GOODAIR, Thai MATTEIN, KeLong AIRKRONE, han xin HANSHIN, etc all kinds of screw compressor.