Lube Oil Blending Local blending plants take bulk petroleum or synthetic base oils and mix them together with additives to create unique oil blends for specific applications and customers. 1124A Cast iron Abrasive resistant sealing option Hardened iron bushings and hardened steel shaft Capacities to 400 GPM 1324A Cast iron Sealless design Capacities to 500 GPM SG Ductile Iron Compact installation Capacities to 190 GPM