Profile: Southwest Seal & Supply Co. is engaged in the production of connector, seals and gaskets. Our seal line includes O rings, karlez, packing and chesterton. We also supply hoses, tubing, couplers, valves, tubing, pneumatic and spiral wound gaskets. Our thermoplastic tubing includes polyethylene tubing, nylon tubing, polypropylene tubing, polyurethane tubing, PVC tubing, PTFE tubing and butadiene (nylon) tubing. We carry a wide range of pneumatic valves and valve systems. Our pneumatic valves are available in standard & metric sizes and materials including stainless steel & brass among others.