Burkert - 20000709 referenced pneum.bet 2/2-way angle seat valve. product produced by high technology. 20000709 became irreplaceable of foundations. 20000709 referenced product which is satisfy the customer's needs, offers advantages of quality and cost. It produced result of tests of laborotory for years. 20000709 referenced product is an original piece of your foundation or machine, original parts makes your machine live longer.