Gorman-Rupp Wastewater Pump represented by Envirep in PA, MD, DE, VA and DC.

Clearance Adjustment on Gorman Rupp Pumps

Gorman Rupp T-Series Pump. Clearance Adjustment is important to maintain pump efficiency and prevent clogging. Gorman-Rupp is represented by Envirep in PA, MD, DE, VA and DC.
Gorman Rupp T-Series Pump. Clearance Adjustment is important to maintain pump efficiency and prevent clogging. Gorman-Rupp is represented by Envirep in PA, MD, DE, VA, and DC.

Clearance Adjustment on Gorman-Rupp Super T-Series pumps is accomplished by moving the cover plate closer to the impeller. This is easily done on the Super T-Series pumps. Clearance adjustment by moving the cover plate eliminates the need to realign belts, couplings, and motors. It also does not disturb the mechanical seal, and impeller back clearance is not disrupted. The unique collar and adjusting screw allow for incremental adjustments of the wear plate clearance with the turn of a hand. After adjusting the clearance, the collar locks are in place, maintaining the clearance setting even if the cover plate is removed. This design doubles the impeller’s and wear plate’s life, keeps the pump operating at maximum efficiency, and helps reduce clogging.

Are you noticing reduced flow or head with your Gorman Rupp Super T-Series pump? It might be time to adjust the clearance. Adjusting the clearance between the impeller and wear plate is an important preventative maintenance task, and it is Super Easy! Follow the link below to see our Service Bulletin which covers clearance adjustment on the Super T-Series Pump.

Performing a shut-off head test is one of the best ways to determine if the pump clearances need to be adjusted. The shut-off head is the maximum pressure a pump can produce at zero flow. By slowly closing the discharge isolation valve while the pump is operating, the pressure in the discharge line will increase, and the pump will eventually reach its shut-off head pressure.

Shut-off Head Test

Comparing the discharge gauge readings to the shut-off head pressure when the pump was new is an excellent way to determine if the pump clearances need adjustment. If the shut-off head pressure is less than 5% of the original shut-off head pressure, it indicates that the internal clearances in the pump have increased due to wear or other factors.

Shut-off Head Test to check internal condition of a centrifugal pump. Envirep is the sales representative for Gorman-Rupp in PA, MD, DE, VA, and DC.
Shut-off Head Test to check the internal condition of a centrifugal pump. Envirep is the sales representative for Gorman-Rupp in PA, MD, DE, VA, and DC.

Adjusting the pump clearances can help restore the pump’s performance and efficiency by reducing internal leakage and improving the pump’s ability to maintain pressure and flow.

Regularly performing shut-off head tests and monitoring pump performance can help identify potential issues early and prevent costly downtime and repairs.

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by Dwight Swan

Gorman-Rupp Super T-Series Clearance Adjustment Service Bulletin by Envirep
Gorman-Rupp Super T-Series Clearance Adjustment Service Bulletin by Envirep

 Gorman-Rupp is the industry leader and innovator in high-quality pump design. At Envirep/TLC, we will help you choose the best Gorman-Rupp® pump parts for your needs. We aim to provide you with easy-to-operate, low-maintenance pump parts to ensure you areas cost-effective as possible.

Envirep/TLC is an authorized distributor of Gorman-Rupp pump products, and we carry a huge inventory of spare parts so our customers receive the best service possible.

When repairing a Gorman-Rupp pump, it is always best to use genuine Gorman-Rupp parts. Gorman-Rupp builds their parts to exact tolerances and exact material specifications. Not having the right part can reduce the service life and affect the pump’s life and efficiency. Only genuine Gorman-Rupp parts can guarantee that your part will fit perfectly and deliver reliable service for many years.