Four-stage diaphragm pumps are an excellent solution for continuous, oil-free pumping of gases when the need is to reach fractional millibar ultimate vacuum. All parts in contact with pumped vapors or gases are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of non-corrosive applications. The NT series pumps provide whisper quiet and ultra-low vibration operation, high leak-tightness and improved vacuum. The highly flexible, fabric-reinforced double diaphragm made of FKM offers extended operating life.
Contamination-free pumping and evacuation
High flow rate even near ultimate vacuum
Outstanding ultimate vacuum
Whisper quiet and ultra-low vibration
Exceptionally long diaphragm life and maintenance-free drive system for low lifetime costs
Number of Heads / Stages
4 / 4
Max. Pumping Speed at 50/60 Hz
2.2 / 2.4
Max. Pumping Speed at 50/60 Hz
1.3 / 1.4
Ultimate Vacuum (abs.)
0.5 / 0.4
Ambient Temperature Range (Operation)
10 to 40
Ambient Temperature Range (Storage)
-10 to 60
Max. Back Pressure (abs.)
Small flange KF DN 16
Silencer / G 1/4"
Rated Motor Power
Rated Motor Speed at 50/60 Hz
Degree of Protection
Noise Level at 50Hz, Typ.
12.80 x 9.40 x 7.80
Pumping unit completely mounted, ready for use, with manual
Seller warrants that its Products are free from defects in materials and workmanship as set forth in applicable operating instructions at the date of shipment to the original Buyer and will conform to the Contract specifications or such other specifications which constitute technical improvements to the Product.* The exclusive remedy of the Buyer in the event of a breach of the foregoing warranty is replacement or repair (at Seller's option) of any defective Product. No goods shall be returned to Seller for repair or replacement pursuant to this warranty without prior written approval and accompanied by a completed health and safety declaration (as specified in Paragraph 7). All cleaning, decontamination, and shipping costs shall be the sole responsibility of the Buyer together with any damage to the goods that might occur in transit to or from Seller. Under no circumstances does Seller's responsibility or warranty extend to Products other than those manufactured or distributed by Seller; nor does Seller's liability extend to any Products, articles or parts which are furnished by Buyer or obtained from other manufacturers or suppliers at Buyer's request and/or in accordance with Buyer's specifications. In the event that Seller is unwilling or unable to repair or replace any defective or nonconforming Product due to change in technical standards, technical modifications, unavailability of material or parts, or any other reason, Buyer shall be entitled to a return of the purchase price paid for such Product as its sole and exclusive remedy. Seller assumes no responsibility for the effective performance of any specific scientific application relying on Products supplied under this Contract beyond published Product specifications at the time of sale. Seller assumes no responsibility for conformance with local building codes as they may apply in the installation of Products supplied by the Seller. Seller assumes no responsibility whatsoever for the accuracy of designs, specifications or materials furnished or specified by Buyer.
No return will be accepted by the seller for any reason without prior written authorization within 30 days of product shipment date. Returns will be accepted only if products are in new, unused, resalable condition in the original packaging, and accompanied by a Health and Safety Declaration as regards potential contamination with hazardous materials due to customer use of the product. The manufacturer reserves the right to assess a minimum 25 percent restocking fee at their discretion. All shipping charges remain payable. This manufacturer assesses order cancellation fees if a submitted order is cancelled prior to shipment.