Tender For corrigendum : supply of air filter pressure regulator, make: placka, model no. : fpr- 3as with pg , spare pressure gauge, dial size: 50 mm, end connection: 1/4 inch npt(n) back connection. , spare repair kit for m/s placka make prv compatible with item no. -1. , spare filter for placka make prv, model: fpr-3as compatible with item no. -1, size: 5 microns , spare plug, material: ss for plugging spare plug for plugging placka make prv port. , spare drain valve for m/s placka make prv, model no. : fpr-3as, material: ss.