R3 Assembly Seal

Robust Assembly Seals for Pumps

Our innovative R3 Assembly Seal is the ideal solution for all the constant pump leaks in your industrial unit. The shafts of any pump are a sensitive area where liquid constantly exerts force and damages the rotating parts. A good assembly seal for pumps strengthens rotating shafts, ensuring that no leaks occur and water is effectively channeled to the right location.

At Robco, we provide all kinds of seal solutions that last, and the R3 seal is no different. The singular large spring ensures that minor misalignments don’t bring down the whole network; the distributed torque mechanism ensures adequate force to withstand high pressure, and the carbon holder is crimped for retention sans adhesives. All of these minute details come together to create an excellent assembly seal.

We offer only high-quality assembly seals for pumps because we recognize how important it is for your machinery to function flawlessly.

An inexpensive replacement for compression packings in pumps that can convert to mechanical seals.

Features and Benefits

Large single spring compensates for minor shaft misalgnment.
Hex drive design distributes torque during start-up creating a positive seal that withstands revers pressure at shut-down and changes of pressure.
Crimped carbon holder retains carbon faces during installation without adhesives.

Technical Data and Dimensions

All standard dimensions will be customized to fit your application.

INCHES
SHAFT SIZE DIAMETER ± .002	SIZE CODE	SEAL OD B	SINGLE SHORT ± .125	SINGLE LONG ± .125	DOUBLE SHORT ± .125	DOUBLE LONG ± .125
.500	008	.917	.812	1.187	1.140	1.520
.625	010	1.185	.875	1.312	1.170	1.600
.750	012	1.302	.875	1.312	1.220	1.650
.875	014	1.429	.937	1.375	1.280	1.720
1.000	016	1.552	1.000	1.562	1.340	1.900
1.125	018	1.600	1.062	1.625	1.470	2.031
1.250	020	1.875	1.062	1.625	1.470	2.031
1.375	022	1.920	1.125	1.687	1.530	2.100
1.500	024	2.125	1.125	1.687	1.530	2.100
1.625	026	2.375	1.375	2.000	1.780	2.410
1.875	030	2.515	1.500	2.125	1.910	2.530
2.125	034	2.938	1.687	2.375	2.100	2.780
2.250	036	2.938	1.687	2.375	2.100	2.780
2.375	038	3.300	1.812	2.500	2.240	2.920
2.500	040	3.500	1.812	2.500	2.300	2.980
2.625	042	3.500	1.937	2.750	2.300	3.250
2.750	044	3.500	1.937	2.750	2.430	3.250
2.875	046	3.800	2.062	2.875	2.480	3.380
3.000	048	3.800	2.062	2.875	2.480	3.380

SIZES: Metric and sixteenth seals available against specific orders. Larger shaft diameters available against speficic orders.

Operating Specifications

Temperature limit: -40C F to ﹢400 F ( -40 C to +205 C)
based on standard elastomers
Pressure limit to: 200 psi

Standard Material Construction

Metal Components: 302/304 SS
Face: Chemical Grade Carbon, Tungsten Carbide, Silicon Carbide
Elastomer: Nitrile or Vitron, also available upon request – EPR and neoprene
Seat: Ceramic, Silicon Carbide

Total Warranty

All Robco seals are manufactured to exact standards, and are guaranteed free of defects in materials and workmanship. All seals are guaranteed for 90 days from delivery, excepting negligence, misuse and abuse, and will deliver at our expense a new seal to replace any seal found to be defective within said period. No registration card is required.

The warranty is expressly in lieu al all warranties, expressed or implied, and of all obligation or liabilities on our part, including any liability for incidental or consequential damages.

Disclaimer

The temperature limits, pH ranges, pressure ratings, feet per box and shaft speeds shown throughout this pamphlet are representative; the service life and performance of these products can be affected by elevated temperatures and other operating conditions such as chemical resistance, shaft speeds, pressure and equipment in which that the product is being installed. The ratings supplied are suggested as a guideline and should only be used for evaluating your specific application. When in doubt, contact Robco or your ENVIROPAK distributor. The information contained in the pamphlet should not be considered to be a warranty, expressed or implied, including, but not limited to, a warranty of merchantability or fitness for a particular purpose. In no event shall Robco be liable for any incidental or consequential damages resulting from the use, misuse or inability to use the products. This exclusion applies regardless of whether such damages are sought based on breach of warranty, breach of contract, negligence, strict liability in tort, or any other legal theory.

All Robco mechanical seals are manufactured, assembled and tested in America.

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