Page 3 - ExpansionJointsCatalog2010

The PROCO Series RC-221 Rubber Concentric Reducer Expansion Joint, often called a
“Taper”, serves as a reducing element to transition from one pipe size to another. Con-
centric in design, each flange-end shares the same common center-line. The PROCO
Rubber Reducer is engineered to replace metallic or rubber-lined reducers used to pro-
vide unequal diameter connections of: piping and/or operating equipment applications
such as: Pumps, Chillers, Cooling Towers, Compressors, Blowers, Fans, Absorption Ma-
chines, etc. Installed next to mechanical equipment or between the anchor points of a
piping system, specify the PROCO Series RC-221 to: (1) Absorb Pipe Movement/Stress,
(2) Reduce SystemNoise, (3) Isolate Mechanical Vibration, (4) Compensate Alignment/
Offset, (5) Eliminate Electrolysis, (6) Protect Against Start-up/Surge Forces. The PROCO
Series RC-221 is engineered for tough, demanding, industrial and commercial applica-
tions, as found in: Air Conditioning-Heating and Ventilating Systems, Chemical-Petro-
chemical and Industrial Process Piping Systems, Power Generating Plants, Steel Mills,
Marine Services, Pulp/Paper Systems, Water-Wastewater-Sewage and Pollution Control
Systems, where metallic reducers used in conjunction with metal hose or expansion
joints may have been previously used or specified. Our history in manufacture of expan-
sion joint products dates back to 1930. PROCO Products is a member of the Rubber
Expansion Joint Division, Fluid Sealing Association. When a rubber expansion joint is
needed to solve a piping system problem, call PROCO.
Traditional design when using a metallic reducer incorporates the use of a flexible element
such as an expansion joint or metal hose to absorb the vibrations and movements of the
system. The PROCO Series RC-221 Reducer combines the basic shape and dimensions
of the metal reducer and the movement-sound reduction-vibration-absorbing features of a
flexible element into one unit. Here are some of the many advantages:
• Less System Installation Space:
The PROCO RC-221 replaces a metal reducer and a flexible element. Thus less space is
required and valves of other equipment can be more conveniently located.
• Less Installation Cost:
The PROCO RC-221 costs less then the metal reducer and flexible element that are
replaced. Additionally, standard joints (as listed in Table 1 and the “stock” section in
Table 2) can be shipped same day as order placement.
Engineered For Your Application: The PROCO Rubber Reducer materials consist of rubber
and fabric which are formed and cured in a heated compression mold using an exclusive
high-pressure press. The thick outer-cover and interior-tube are of an elastomer espe-
cially compounded to satisfy the Chemical-Temperature requirement of your application.
Available styles include:
• Style RC-221:
Features one Open Arch for maximummovement, and good noise-vibration control. Our
most popular style. (See Figure 1)
• Style-RCFA-221:
Features one Filled Arch, is generally specified for slurry or abrasive services. Provides
noise and vibration control but less movement than Style RC-221. (See Figure 2)
Absorbs Pipe-Wall And Fluid-Borne Noise. The PROCO quiet-operating Series RC-221 is
a replacement for “sound transmitting” metallic reducers. Pipe-Wall sound loses energy
and is absorbed as the noise carried by the piping enters and exits the rubber section.
Fluid-borne noise is absorbed by the volumetric expansion (breathing) of the connector.
This action cushions water hammer, and smooths out pumping impulses.
Isolates Vibrations And Motion. Vibration originating from mechanical equipment is ab-
sorbed by the PROCO Series RC-221. Rubber connectors should be installed right after
and ahead of the equipment generating the vibration, thus isolating the equipment. Most
machinery vibrates in a radial direction from the main shaft. For optimum performance the
PROCO connector should be installed horizontally and parallel to this shaft. Vertical and
perpendicular installations are also acceptable as the PROCO Reducer will accept both
axial and lateral movements and vibration. Installations of the Series RC-221 in a system
enables isolated equipment to move freely on its vibration mountings. Note: For maximum
vibration transmission reduction, the piping section beyond the rubber connector must be
anchored or sufficiently rigid.
Chemical Or Abrasive Service Capability At Minimal Cost. Expensive, exotic metal or
rubber lined reducers for chemical service can be replaced with the PROCO Rubber
Reducer. Fabricated with low-cost chemical resistant elastomers such as: Chlorobutyl,
EPDM, Hypalon, Neoprene and Nitrile; insures a rubber connector compatible with the fluid
being pumped or piped. (See Table 1) Our Neoprene, Natural/Gum and filled arch products
should be specified when handling abrasive slurries. Use the PROCO “Chemical to Elas-
tomer Guide” to specify an elastomer for your requirement.
Reduces System Stress And Strain/Compensate For Misalignment. Rigid attachment of
piping to critical or mechanical equipment can produce excessive loading. Thermal or
mechanically created strain-stress-shock are cushioned and absorbed with the installa-
tion of a flexible low “force-to-deflect” PROCO Rubber Reducer. The PROCO Style RC-221
adds a flexible component that is automatically self-correcting for misalignment created by
structural movements caused by settling, expansion or ground shifts.
Flange And Retaining Ring Drilling. All PROCO rings are coated to prevent corrosion and
dimensionally drilled to ANSI 125/150# standards. In accordance with ANSI, all bolt hole
pairs “straddle” the center line. Hole drilling on center line, other drilling standards or
materials such as: 304 or 316 Stainless and Bronze are available on special order.
Less Turbulence Or Material Entrapment. The molded integral flange of the PROCO Rub-
ber Reducer joins the body at a true 90 degree angle. Our product will install snug against
the mating pipe flange without voids. Because this flange-body angle is difficult to form,
many competitors severely radius this edge angle. The resulting void can create flow
turbulence, allow for material entrapment and/or bacteria growth. Avoid these problems
by specifying PROCO.
Exclusive Sealing Bead Means A Quick Seal. We have built an “O-Ring” on each flange-
face of the Series RC-221. Available only from PROCO, our product seals faster with less
torque at installation and less long-term maintenance. For exclusive design features,
specify PROCO.
High Pressure With Full Safety Factors. We have assigned conservative pressure ratings
to the Series RC-221. However, the ratings meet or exceed the requirements of the Rubber
Expansion Joint Division, Fluid Sealing Association, for Series A, B, and C. More impor-
tantly, our conservative ratings are fully tested and based on a minimum four-to-one safety
factor. With competitive products the safety factor is often calculated or unknown. For
pressure protection, specify PROCO.
PROCOTM
PROCOTM Maximum4 Branding F.S.A.
Material Cover/ Tube/ Operating Label Material
Code Outside Inside Temp. °F Color Class
S S /BB Butyl Butyl 250° Black Special II
X X /EE EPDM EPDM 250° Red Special II
X X /NH Neoprene Hypalon1 230° Green Standard II
X7 X7 /NN3 Neoprene Neoprene 230° Blue Standard II
X X /NP Neoprene Nitrile 230° Yellow Standard II
X X /NR Neoprene Natural2 180° White Standard I
RC-221RCFA-221
Style Numbers Type of Elastomer
Table 1: Available Styles • Materials • Temperatures • Stock
For Specific Elastomer
Recommendations, See: PROCO TM “Chemical to Elastomer Guide”
NOTES: 1. Hypalon is a trademark of E.I. duPont Nemours & Co.
2. Filled Arch is Tan-Gum, Open Arch is Black-Natural.
3. Material NN meets all requirements of U.S.C.G.
4. In applications where pressure is less than 15 PSIG, temperature may be increased.
5. All products are reinforced with synthetic fabric plies.
6. Material Availability: X=Special Order, S=Standard Stock.
7. Certain sizes in stock, call for availability.
8. To Order, provide: 1. Size (I.D. x Length), 2. Style Number, 3. Material Code.
Visit Our Website: http://www.procoproducts.com
email: sales@procoproducts.com
TM
SERIES
concentric reducer expansion joints