Rilco Cam Roller Constants

Overview

Through years of R&D Rilco has developed the Rilco Cam Roller Constant. The design of the Rilco Cam Roller™ constant or “RCR” compensates for the vertical movement of a piping system at a performance level previously unattainable using a standard horizontal or vertical type constant spring support.

Design Features:
RCR constants are fabricated utilizing space saving, balanced design compatible with standard Rilco pipe hanger hardware. Site installation is enhanced as well, via the use of the centered, single point connection. RCR constants transfer the load directly through the center of the body, eliminating the moment imposed on the supporting members (typically seen with the use of standard level arm constants). The interpretation of the vertical displacement of the supported piping is made simpler through the use of a direct reading travel indicator. 

Single Unit Cam Roller Constant Double Unit Cam Roller Constant Triple Unit Cam Roller Constant Quad Unit Cam Roller Constant
Single Unit Double Unit Triple Unit Quad Unit

Construction:
A rugged carbon steel housing encapsulates the springs and other moving parts of the unit. The center-mount feature of the unit allows for the support of the piping system directly above the support node point on the pipe. If required, optional mounting arrangements are available to tie into existing support lugs. Connecting threads are interchangeable with all standard hanger components. RCR units which consist of multiple units tied together for increased load capacity are supplied with a yoke plate at both the top and the bottom connection points.

Performance Range:
Rilco Cam Roller™ constants are available with a standard load capacity of 20 lbs (.09 kN) to 88000 lbs (391 kN) with standard travel ranges of 3”(75mm) through 18”(450mm). Loads and travels beyond those listed can also be accommodated. Contact us direct for more information.

Every RCR constant is tested for operational ability and proper settings in accordance with customer specifications and Rilco’s quality control standards. The innovative design enables the RCR to exceed the MSS-SP-58 requirement of a 6% load deviation and commonly tests at a deviation of 3% or less (test results available upon request).

Operational Function:
Rilco is proud to announce that the RCR constant pipe support incorporates all of the necessary elements to create a near perfect constant:
1. Absolute load setting reliability
2. Minimal component friction
3. Reliable indicators of travel and load
4. Precise adjustment of the unit should deviations be required

Cam Roller Constant Catalog 

     View our Cam Roller Constant Catalog for complete specs.

Top reasons to use the RCR for your project:

  • Zinc-Cobalt coated hardware on all models
  • Will not add twisting forces to the structural steel
  • 100% factory testing and confirmation of deviation and working range motion
  • Housing Painted per customer specifications or hot-dipped galvanized
  • Guaranteed compliance with deviation standards
  • Precision quality set removed springs
  • Field adjustable up to 50% of the load
  • Stainless steel pins

RCR Constant Size Quick Reference Chart

Need to figure out which Rilco cam roller constant type you need? Use our handy load and travel table to figure out the constant you need for your particular application.

Rilco Cam Roller Constant Size Quick Reference Chart

The ABC's of Constant Types

 

Type A uses a female thread in the top of the assembly which can receive a fully or partially threaded rod or a bolt. The lower attachment point consists of a turnbuckle with right hand threads for the hanger rod connection. The thread diameters for both the top and the bottom connections will be driven by the size of constant selected. This design does not require any intermediate attachments, other than the threaded rod, prior to installation. Type As are available only as single unit assemblies.
Type B is defined by a single lug top mount which is bolted to the RCR assembly. This type of arrangement is typically used in situations which require the constant assembly to be close mounted to supporting structure, or in retro-fit applications. The top single lug typically works in conjunction with a clevis or a welded beam attachment. The lower attachment point consists of a turnbuckle with right hand threads for the hanger rod connection for single unit assemblies. Multiple unit assemblies use a single common lug for both the top and bottom connections. They can use the same connection arrangement on the top as the single unit assemblies, but require a clevis or a double lug arrangement for the lower connection. The hanger rod diameters for both the top and the bottom connections will be driven by the size of constant selected. (single unit assembly shown)
Type C is defined by a double lug top mount which is bolted to the RCR assembly. This type of arrangement is typically used in situations which require the constant assembly to be close mounted to supporting structure, or in retro-fi t applications. The top double lug typically works in conjunction with a structural welding lug or existing attachment plate. The lower attachment point consists of a turnbuckle with right hand threads for the hanger rod connection. The hanger rod diameters for both the top and the bottom connections will be driven by the size of constant selected. Type Cs are available only as single unit assemblies.
Type D is a resting type which uses existing structure to directly support the RCR assembly. This arrangement is most often used when little or no space exists below the support structure. This type of constant has no top mount connection, but instead relies on existing structure for support. The lower attachment point consists of a turnbuckle with right hand threads for the hanger rod connection for single unit assemblies. Multiple unit assemblies use a single common lug for the bottom connection. They require a clevis or a double lug arrangement for the lower connection. The hanger rod diameter for the bottom connection will be driven by the size of constant selected. (single unit assembly shown)
Type E requires auxiliary brackets on either side of the RCR assembly for support. This arrangement is most often used when little or no space exists below the support structure. This type of constant has no top mount connection, but instead relies on the side brackets for support and transfer of force to the support structure. The lower attachment point consists of a turnbuckle with right hand threads for the hanger rod connection for single unit assemblies. Multiple unit assemblies also utilize the auxiliary side brackets, but use a single common lug for the bottom connection. They require a clevis or a double lug arrangement for the lower connection. The hanger rod diameter for the bottom connection will be driven by the size of constant selected. (single unit assembly shown)