Get current pricing for Sprout Waldron, 1410 MST Sprout Waldron 304 Stainless Steel Rotary Air Lock. Model 1410 Mst. Serial # 83-1305. Has An 8 Vane, 14 D X 10 L, Type 2 Rotor. Has A 10 X 10 Open . Product Category: Process Equipment, Sub Category: Process Valves: