These U-type upthrust constant supports are designed to handle 6″ of total travel and loads of 5,677 lb. and 4,956 lb. The load flange is modified to hold six ball transfer units for each support. The ball transfer units are used to decrease the coefficient of friction to 0.05 compared to using the standard PTFE, 25% glass filled, which is 0.15.

Gussets are added under the load flange to maintain a leveled surface and an equal load transfer to all ball transfer units. These custom designed constant supports are manufactured for steam power plant superheaters.

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200-U Type Constant-Custom Design
– Designed for 21,269 lb. load
– 26-1/4″ W x 80″ L x 28-1/2″ H
– 10″ upward travel
– 12″ total travel

200-U Type Constant
– Designed for 18,273 lb. load
– 26-3/8″ W x 66″ L x 23-1/4″ H
– 0.43″ downward & 1.22″ upward travel
– 3″ total travel

100-G Type Constant
– Load range: 15,226 lb. to 17,210 lb
– 13″ W x 87″ L x 59″ H
– 2.8″ downward travel
– 4″ total travel

200-U Type Constant-Custom Design
– Load Range: 14,060 lb. to 18,334 lb.
– 27″ W x 84″ L x 24-5/8″ H
– Actual Travel Range: 10″ to 11″ Upward
– Total Travel Range: 12-1/2″ to 13-1/2″

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The constants‘ dimensions are 25” x 56” with 17” pipe OD, and 29” x 68” with 21” pipe OD. These constants have a loaded capacity of 8,400 to 17,800 lbs. This constant is designed to support piping from below. The tests that were conducted on this product were standard loading and travel testing to ensure quality and performance. The constant is manufactured from A36 carbon steel.

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Piping Technology & Products, Inc. recently fabricated 48 PTP-200 type U and 54 PTP-100 type B constants for an oil refinery in Texas.  The PTP 200 type U with base support constants are designed for operating loads ranging from 650 lbs. to 7700 lbs. and a travel range of 3″ to 4″. They are fabricated out of A36 carbon steel with dimensions ranging from 15″x22″ to 27″x38″. The PTP 100 type B constants are fabricated from A36 carbon steel with dimensions ranging from 11.5″x23″ to 12″x29″ and total travel of 3″ to 4″. These constants are designed for operation loads ranging from 1100 lbs. to 2800 lbs.  Space restrictions required a customized compact design. Standard load testing was performed to ensure product quality prior to shipping.

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Piping Technology & Products, Inc. recently designed and manufactured 200 U-Type upthrust constants for a geothermal plant in Hawaii. The constant pictured on the left has frame dimensions of W 40″ x H 75″ x L 142″, a constant load of 9,888 lb. to 10,239 lb. and a design travel of 46″. It also utilizes rollers and PTFE, 25% glass filled slide plates to reduce the friction resulting from axial movements. All the constants in this project are composed of A36 carbon steel. Standard load testing and travel testing were conducted prior to shipment.

Do you require custom constants like those described above? Let us price them for you today!