DR20-5-5X/200YM力士樂溢流閥

R900597233 DR20-5-5X/200YM力士樂溢流閥

武漢百士自動化設備有限公司專注于液壓、氣動、工控自動化備件銷售，熱誠歡迎新老客戶咨詢購買！

我司主要經銷氣動，液壓，工控自動化流體控制設備備品備件
主營*牌：博世力士樂BOSCH-REXROTH、安沃馳AVENTICS、迪普馬DUPLOMATIC、愛爾泰克AIRTEC、本特利Bently、貝加萊B&R、世格ASCO、阿托斯ATOS。
主要涵蓋產品：電磁閥、比例閥、單向閥、溢流閥、壓力繼電器、壓力傳感器、葉片泵、柱塞泵、齒輪泵、蓄能器、氣動閥、氣缸、氣源處理單元、探頭、前置器、延伸電纜、監測模塊、校驗儀、伺服驅動器、PLC模塊、I/O模塊、伺服電機、觸摸屏等。
溢流閥是一種液壓壓力控制閥。在液壓設備中主要起定壓溢流作用，穩壓，系統卸荷和安全保護作用。 　定壓溢流作用：在定量泵節流調節系統中，定量泵提供的是恒定流量。當系統壓力增大時，會使流量需求減小。此時溢流閥開啟，使多余流量溢回油箱，*證溢流閥進口壓力，即泵出口壓力恒定（閥口常隨壓力波動開啟）。
穩壓作用：溢流閥串聯在回油路上，溢流閥產生背壓運動部件平穩性增加。
系統卸荷作用：在溢流閥的遙控口串接溢小流量的電磁閥，當電磁鐵通電時，溢流閥的遙控口通油箱，此時液壓泵卸荷。溢流閥此時作為卸荷閥使用。
安全保護作用：系統正常工作時，閥門關閉。只有負載超過規定的極限（系統壓力超過調定壓力）時開啟溢流，進行過載保護，使系統壓力不再增加（通常使溢流閥的調定壓力比系統**工作壓力高10%～20%）。
實際應用中一般有：作卸荷閥用，作遠程調壓閥，作高低壓多*控制閥，作順序閥，用于產生背壓（串在回油路上）。
溢流閥一般有兩種結構：1、直動型溢流閥 。2、先導型溢流閥。
對溢流閥的主要要求：調壓范圍大，調壓偏差小，壓力振擺小，動作靈敏，過載能力大，噪聲小。

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