Project Description


Bellow Pump Connectors

In this paragraph, I am going to tell you about bellow pump connectors. Firstly pump connectors are made to be installed near mechanical equipment to help with vibration, absorb small pipe movements. And to provide flexibility during installation. Furthermore, the bellows is made for maximum flexibility and fatigue resistance. Additionally standard configurations include limit rods to react to the pressure thrust or compression for vacuum conditions. Finally bellows pump connectors installed on the pump to absorb motion. Additionally Contact Us for a quote or more information.

    • Sizes 1-1/2” through 24”
    • Design Conditions: full vacuum to 150 and 300 psig at 500°F
    • Compact design with maximum flexibility and extended life

Standard configurations include integral full thrust limit rods to react the full pressure thrust or compression for vacuum conditions. This rugged product is designed for the most demanding industrial applications, or the maximum reliability for HVAC installations. Standard configurations are available from inventory. Consult the factory for non-standard designs involving special materials or design conditions.


Bellows pump connectors are designed to connect piping to mechanical equipment that has thermal growth or
mechanical movement. Although limit rods are an integral part of the design to prevent over extension or compression, these rods should be installed loose for full benefit. The rigid anchor shown in the illustration must be capable of reacting the pressure thrust and the spring force of the bellows.

Flow Liners

Flow liners or internal sleeves are optional features on standard Bellows Pump Connectors. Their purpose is to: minimize pressure loss, prevent bellows resonance in turbulent flow, prevent erosion of the bellows if the media contain abrasive material or to prevent direct impingement of high temperature flow on the bellows.


In this paragraph, I am going to talk about some of the EJMA has guidelines. Firstly flow liners are recommended for gas flow with velocities exceeding 4 ft./sec. per inch of diameter through 6” NPS, and 25 ft./sec. for sizes larger than 6” NPS. Secondly for liquid flow, liners are recommended for velocities exceeding 2 ft./sec. per inch of diameter through 6” NPS, and over 10 ft./sec. for sizes over 6” NPS. Then if extremely turbulent flow conditions exist, the actual flow velocity should be multiplied by 4 to use these criteria. Next liners are designed for unidirectional flow, and flow conditions normally experienced in industrial and HVAC applications. Finally, for conditions involving bi-directional flow, high velocities, abrasive materials or extreme turbulence, consult the factory.