KNIFE GATE VALVE WITH FLOW DIRECTION, PN10/CL150 1. Size: DN50-DN800 2. Design as MSS-SP-81 3. Test: DIN3230, MSS-SP-81 KNIFE GATE VALVE WITH FLOW DIRECTION, PN10/CL1501. Size: DN50-DN8002. Design as MSS-SP-813. Face-to-face dimensions: MSS-SP-81, factory’s standard4. Test: DIN3230, MSS-SP-81