If the image does not match information, please call us! Parker Parker RE * W series direct operated proportional relief valve Parker Parker RE * W series direct operated proportional relief valve allows continuous adjustment of the minimum pressure valve to the rated pressure. Usually only used to regulate the flow of hydraulic equipment requires little or as pilot valve regulating variable displacement pump. Electric proportional valve is controlled by PCD00A-400 digital amplifier board, and closed-loop control for pressure. PARKER Parker servo valve agent is an agent of our brand, in 2008 the company was founded. Our company can own declaration of imports, products are purchasing directly from manufacturers back, I now Secretary of Pike price than there are goods of other traders have the advantage, but I can promise the Secretary Parker products leave a lost decade In after-sales question I can also Secretary to provide technical assistance, welcome to inquire, I do everything we can to meet your needs. Parker difference difference between the servo valve and proportional valves Parker and Parker servo valve proportional valve and no strict rules, because the performance of the proportional valve is getting better, and gradually close to Parker servo valve, so in recent years there has been proportional Parker servo valve. Parker difference proportional valve and servo valve is mainly reflected in the following points: 1. The drive different devices. Proportional valve drive means is proportional solenoid; Parker servo valve driving means is force motor or torque motor; 2. different performance parameters. Hysteresis, dead zone in place, bandwidth, filtering accuracy and other characteristics different, so different applications, BIERI flow control valve, Parker servo valve and servo proportional valves are used in closed-loop control system, proportional valve is mainly applied to other structures in the open environmental control system and closed loop speed control system; 2.1 Parker servo valve in position no dead zone, proportional valves are in position dead zone; 2.2 Parker servo valve frequency response (response rate) higher, up to about 200Hz, proportional valves are generally highest tens of Hz; 2.3 Parker servo valve for hydraulic fluids demanding, need filtered job or easy to plug, valve, proportional valve requires lower; 3 different valve structure and precision. Use proportional valve spool + body structure, body doubles valve sleeve. Parker servo valve and servo proportional valves using spool + sleeve structure. The median function of different types. Proportional valve having a valve similar to the ordinary median function, while the median Parker servo valve function only O type (Rexroth products E-type). 5. The valve of different nominal pressure drop. Mai Sheng Machinery Co., Ltd. Jinan supply advantages proxy NOREVA valve Brand Model Price sample size picture if picture does not match with the product, information, please call us! Germany NOREVA GmbH is NOREVA nozzle check valves professional manufacturers, for decades, focused on the production of check valves. Currently NOREVA nozzle check its advantages have been widely recognized and used in liquids, gases and gas sector plays a crucial role. The main field of pipelines, steel mills, chemical plants, water plants, power plants and compressor stations. NOREVA nozzle valve of an economic, reliable, BSL-01 German passengers solenoid valve, maintenance-free design. To ensure the stability of product quality, products are German factory own production, are subjected to rigorous testing and water testing. Description: NOREVA Check Valve Series: NRV-ZK, NRV-ZSK, NRV-B, NRV-BK, Japan SMC solenoid valve, NRV-G, NRV-Z, NRV-ZK, NRV-K, NRV-R Some models: NRV-ZK DN 25 ANSI 150NRV-ZK DN 32 ANSI 150NRV-ZK DN 40 ANSI 150NRV-ZK DN 50 ANSI 150NRV-ZK DN 65 ANSI 150NRV-ZK DN 80 ANSI 150NRV-ZK DN 100 ANSI 150NRV-ZK DN 125 ANSI 150NRV-ZK DN 150 ANSI 150NRV-ZK DN 200 ANSI 150NRV-ZK DN 250 ANSI 150NRV-ZK DN 300 ANSI 150 SUN high flow solenoid valves, hydraulic valves Jinan (certification), the valve is provided by Jinan Mai Sheng Machinery Co., Ltd. . Jinan Mai Sheng Machinery Co., Ltd. (www.smkct.com) is a leader in Jinan, Shandong Province, hydraulic components, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Mai Sheng Machinery leadership in the staff warmly welcome all inquiries negotiations to create a win Mai mechanical better future.