Zjtq-3750 Zjq-3750 Roots Vacuum Pump with Pre-Admission Cooling

 Working principleRoots pumps with pre-admission cooling mainly consists of rotor 1 and 2, pump body 4, gas cooler 7, etc(see figure below). Due to its special internal structure design, it can operate reliably for a long time under high differential pressure and high compression ratio.The cooling gas enters the suction chamber of the pump from both sides of the pump body so that the pump does not overheat due to the compressed gas, but has no effect on the pumping performance. The figure below shows the rotor rotating 120 degrees in the pump chamber and completing one suction and exhaust.Cooler and motor are necessary accessories for each pump, and the specifications of cooler and motor are based on different working conditions. The pumps can be used individually or in series, or in combinations with liquid ring vacuum pumps and Roots vacuum pumps to achieve higher vacuum to meet various process requirements.Main features1. When used alone, the working vacuum can reach 150 mbar in direct discharge to atmosphere.2. Multi-stage tandem or tandem with other backing pumps can reach medium vacuum.3. Special structure design ensures that the pump will not overheat and overload when operating at high differential pressure and high compression ratio.4. Tri-Lobe profile and high precision machining ensure smooth and quiet operation.5. Pumping performance, noise, vibration and other major performances are much improved than the traditional two-lobe pump.6. An optional advanced balanced mechanical seal makes the pump sealing performance more reliable than the traditional lip seal.7. The pump housing is oil-free structure, which is suitable for pumping out general air and various special gases.8. Compared with other mechanical vacuum pumps, the energy-saving is up to 20%. Product ParametersTypeNominal pumping speed(50Hz)Ultimate pressureNominal motor rating (50Hz)  Nominal motor speed  (50Hz) Suction Connection sizeDischarge Connection sizeMaximumcooling water requiredWeight (Without Motor)L/sPaKwrpmmmmmL/hKgZJTQ-150150150003~18.5290080803500350ZJTQ-300300150005.5~3729001251256000350ZJTQ-600600150007.5~7514602502009000650ZJTQ-120012001500011~1321470300250150001200ZJTQ-250025001500022~280980350350280002300ZJTQ-375037501500030~4001470350350350002300Note: The motor power and cooler surface area are determined by the working differential pressure, and different motors and coolers can be configured for different differential pressures.  Pressure diagramDimension ModelDNDNIAA]A2A3BB1B2HH1H2ΦZJTQ-1508080554281551323583002103401702032ZJTQ-300125125652325601854283602404052152542ZJTQ-600250250965492902966785603706302105060ZJTQ-120030030012366421174407706504506802305085ZJTQ-250035030014657631286169427306128804156590ZJTQ-3750400350173092513082098080060088026570105FAQQ: What information should I offer for an inquiry?A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.Q: Can you make a customized vacuum pump?A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements. Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we'll be very happy if we can offer any help to your vacuum system.Q: Can you design and make customized vacuum systems?A: Yes, we are good for this.Q: What is your MOQ?A: 1 piece or 1 set.Q: How about your delivery time?A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.Q: What are your payment terms?A: By T/T, 50% advance payment/deposit and 50% paid before shipment.Q: How about the warranty?A: We offer 1-year warranty (except for the wearing parts).Q: How about the service?A: We offer remote video technical support. We can send the service engineer to the site for some special requirements./* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1