We are offering single spring balanced seal. Seal proof make complete bidirectional single spring unbalance mechanical seal.this series of mechanical seal are design for the dirty media type applications.it is independent in the direction of rotation. It is simple in construction and easy to instal. Torque transmission for seal ring will be done through its drive lug.all parts of the seal are interchangeable,one can easily convert spe701 to spe704 only by changing it’s elastomers.