Effective November 1, 2000

INSTALLATION PROCEDURES
FOR SIMSITE® PRODUCTS

INTRODUCTION:

These instructions provide the user with the basic installation procedures for Simsite® products, supplementing existing metallic pump technical manuals and/or Technical Repair Standards. If a conflict develops between the existing procedures and this instruction, this instruction takes precedence. These instructions, along with basic knowledge of pump assembly and maintenance practices, will assure the optimum efficiency and life of the Simsite® part. The installation philosophy for pumps containing Simsite® Composite Components differs slightly from that of pumps with metal internals. Although Simsite® Structural Composites have a high strength to weight ratio and are superior to metallics and other composites in performance, reliability, longevity and corrosion resistance, they are softer and lighter than metals and must therefore be handled and installed with care to avoid unnecessary damage. When installing Simsite® Composites, never strike the composite component with a hard tool or object. Use only a soft wood, plastic or rubber hammer if you need to tap them into place. Never use a puller on Simsite® Impellers (It is not necessary) or put a direct flame on the Composite. If this installation procedure, along with the specific equipment technical manuals and/or Technical Repair Standards are not followed, all warranties and guaranties are made null and void.

SIMSITE® CASING RINGS:

Simsite® Casing Rings are designed to run with Simsite® Impellers. The composite wear ring to composite casing ring surface assures maximum efficiency, performance, longevity, and reduces the possibility of seizing, galling, and catastrophic pump failure. If a Metallic Ring is used with a Simsite® Impeller or a Sirnsite® Wear Ring, the Simsite® Ring clearance and procedures must still be maintained. (See Table 2 on Page 6) The rings will last longer, perform better, and wear better if Simsite® Casing Rings are used in conjunction with Simsite® Impellers.

INSTALLATION OF SIMSITE® CASING RINGS INTO PUMP CASINGS WHEN A PRESS FIT IS REQUIRED:(End Suction or Overhung Type Pumps)

Prior to the installation of Simsite® Rings, the ring areas in the pump casing should be cleaned and all burrs removed. The casing bore should be indicated to make sure that it is true (concentric). If the casing bore is not running true, it must be machined before the Simsite Casing Ring can be installed.

When you press a Simsite® Casing Ring into a pump casing, you must add an interference fit to the outer diameter of the ring as you would with a stainless steel or bronze ring. Sims recommends an interference fit of .001 inch per diametrical inch with a minimum of .003 inches and a maximum of .010 inches for diameters up to 12.00 inches. (To set the interference fit for those rings with a diameter above 12.00 inches please consult the factory.) For example, an 8.000 inch diameter casing ring would be machined to 8.008 inches for an interference fit of .008 inches into the casing. See Table 1 for the interference fits of Simsite® components.

Simsite® rings can be chilled or frozen to facilitate pressing the ring into the pump casing. Pressed Simsite® Casing Rings must be secured with a two part epoxy system (Sims epoxy Glue, Devcon Putty "A", Fixmaster or equivalent) and with 3 -4 set screws.
 

INSTALLATION OF SET SCREWS WITH A SIMSITE® CASING RING

When installing set screws into a metal casing to secure the Simsite® Casing Ring, the holes for the set screw should be drilled so that 75% - 80% of the screw will be in the casing and only 20% - 25% will be in the Simsite® Composite Ring. The size of the set screws being installed should be the same size as the original set screws or the same size that would be used if a metallic casing ring were being installed. The Simsite Ring must have a minimum wall thickness of .125 inches at the point of installation of the set screw. Care must be taken to ensure that the drill or tap does not “walk” towards the softer composite material when drilling and tapping for the set screws. If necessary, make a fixture to prevent this problem. When tapping the holes for the set screws, standard tapping procedures should be followed.
 

WARNING

Do not force the tap.

When set screws are used, the casing ring inner diameter should be checked for possible distortion after the set screws are installed. If the distortion is greater than .002 inches, then a final machining cut or sanding will be required to maintain the necessary operating clearance. (See Table 2 on Page 6).

After the set screws are installed, the Simsite® Casing Ring inside diameter must be checked for possible distortion. If the distortion is greater than .002 inches, then a final machining cut or sanding will be required to maintain the proper operating clearance.
 

INSTALLATION OF SIMSITE® CASING RINGS INTO PUMP CASING WHEN A PRESS FIT IS NOT REQUIRED:(Split Case or Between Bearins type Pump)
 

Prior to the installation of Simsite® Rings, the ring areas in the pump casing should be cleaned and all burrs removed. The casing bores should be indicated and leveled to make sure that it is true (concentric) and properly aligned. If the casing bore is not running true, or if it is not level with the other casing bores, it must be machined before the Simsite® Casing Ring can be installed.

When installing Simsite® Casing Rings that are not press fit into their pump housings, it is important that there is enough clearance at the outer diameter to assure that the casing rings are not pinched upon bolt-down of the pump casing. It is recommended that a .002 to .005 inch clearance is maintained between the Simsite® Casing Ring outer diameter and the pump casing.

To determine if the casing ring is pinched, the ring must be blued (or chalked), installed in the pump, and then removed for inspection. Upon inspection of the casing ring, pinching marks should not be evident on the blued or chalked surfaces of the casing ring. If pinching does occur, the Simsite® Casing Ring can be sanded slightly to eliminate the pinching. If pinching persists, then the casing ring may require machining.

However, machining of the Simsite® Casing Ring is not recommended if the metallic pump casing is distorted, or if there is damage to the metallic pump casing ring landing surfaces within the casing. The pump casing must be repaired or machined instead. The ring areas in the pump casing should be cleaned after machining and all burrs removed -
 

SIMSITE IMPELLER WEAR RINGS
 

Installation of Simsite Impeller Wear Rings are not necessary. When a new Simsite impeller is purchased, Simsite wear rings come standard (integral) with the impeller. Integral Simsite wear rings assure maximum efficiency, strength, and longevity. A common misconception is that the impeller needs separate wear rings. Since the Simsite rings do not seize and gall like metallic rings, the impeller wear ring surface should be trued-up in a late when necessary and new undersize Simsite Casing Rings should be purchased.
 

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