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Proco Style 262R

Proco Style 262R molded wide double arch expansion joints have the lowest spring rates of any expansion joints currently on the market. They also boast low forces to deflect, and are built to withstand even the most rigorous piping system configurations.

They allow for axial compression or axial extension, and lateral deflection as well as angular and torsional movements.

Some of the notable features and benefits of the Proco Style 262R are:

  • Absorption of Directional Movement
  • Absorption of Vibration, Noise and Shock
  • Compensation for Misalignment
  • Self-Cleaning Wide Arch
  • Wide Choice of Flange Construction Materials Available
  • Lighter Weight

For more information about the features and benefits of the Proco Style 262R, download our brochure.

For up-to-date pricing and availability information, contact Proco today.

Available Styles & Materials

For Specific Elastomer Recommendations, See: PROCO "Chemical To Elastomer Guide"
262-RPROCO Material CodeCover ElastomerTube ElastomerMaximum Operating Temp. °F (°C)Branding Label ColorF.S.A. Material Class
X BB Chlorobutyl Chlorobutyl 250 °F (121°C) Black STD. III
S EE EPDM EPDM 250 °F (121°C) Red STD. III
S NH Neoprene CSM 212 °F (100°C) Green STD. II
X NN Neoprene Neoprene 225 °F (107°C) Blue STD. II
S NP Neoprene Nitrile 225 °F (107°C) Yellow STD. II

Notes:

All products are reinforced with tire cord and metal materials.

1. Products mark (S) are in stock items.

2. All NN, NH & NP elastometer designated joints meet the Coast Guard Requirements and Conform to ASTM F 1123-87 and are marked accordingly.

 

Expansion Joint Size Nom. I.D. x
Inch / (mm)

Neutral Length
Inch / (mm)

262R Movement Capability: From Neutral Position 1Spring RatesOperating Conditions 2

Weights in lbs3
(KGS)

Axial Compression
Inch / (mm)

Axial Extension
Inch / (mm)

Lateral Deflection
Inch / (mm)

Angular Deflection4
(Degrees)

Torsional Rotation 5
(Degrees)

Thrust Factor 6
In2 / (cm2)

Force Pounds for 1″ Axial Compression
lb/in / (N/mm)

Force Pounds for 1″ Axial Extension
lb/in / (N/mm)

Force Pounds for 1″ Lateral Deflection
lb/in / (N/mm)

Positive PSIG / (Bar)Vacuum Inches of Hg / (mm of Hg)Expansion JointRetaining Ring SetControl Unit Assembly 7

2
(50)

12
(300)

2.5
(64)

1.25
(32)

1.625
(41)

405

14.18
(92)

99
(17.25)

118.5
(21)

97.5
(17.25)

150
(10.3)

24
(610)

4.0
(1.8)

4.0
(1.8)

3.4
(1.5)

2.5
(65)

405

17.71
(114)

96
(16.5)

105.75
(18.75)

83.25
(14.25)

150
(10.3)

24
(610)

5.0
(2.27)

4.5
(2.0)

3.4
(1.5)

3
(80)

365

21.64
(140)

104
(18)

156
(27)

99.75
(17.25)

150
(10.3)

24
(610)

5.0
(2.27)

5.5
(2.5)

3.4
(1.5)

4
(100)

304

30.66
(198)

82
(14.25)

135
(24)

78.75
(13.5)

150
(10.3)

24
(610)

6.0
(2.72)

6.0
(2.7)

3.4
(1.5)

5
(125)

304

41.26
(266)

107
(18.75)

142.5
(24.75)

102
(18)

150
(10.3)

24
(610)

9.0
(4.08)

8.5
(3.9)

4.8
(2.2)

6
(150)

304

53.43
(345)

102
(18)

124.5
(21.75)

110.25
(19.5)

150
(10.3)

24
(610)

11
(4.99)

9.5
(4.3)

4.8
(2.2)

8
(200)

304

82.47
(532)

169
(30)

172.5
(30)

157.5
(27.75)

150
(10.3)

24
(610)

13
(5.90)

14.5
(6.6)

9.6
(4.4)

10
(250)

14
(350)

3.25
(83)

1.375
(35)

1.25
(32)

204

135.13
(872)

186
(32.25)

285.75
(50.25)

210.75
(36.75)

150
(10.3)

24
(610)

22
(9.98)

17.0
(7.7)

12.0
(5.4)

12
(300)

4
(102)

1.625
(41)

1.25
(32)

164

179.46
(1158)

283
(49.5)

369.75
(64.5)

306.75
(54)

150
(10.3)

24
(610)

31
(14.06)

24.5
(11.0)

12.0
(5.4)

NOTES:
1. Concurrent Movements – Concurrent movements are developed when two or more movements in a pipe system occur at the same time. If multiple movements exceed single arch design there may be a need for additional arches.
To perform calculation for concurrent movement when a pipe system design has more than one movement, please use the following formula:

formula
Calculation must be equal to or less than 1 for expansion joint to operate within concurrent movement capability.
2. Pressure rating is based on 194°F operating temperature. At higher temperature the pressure rating is slightly reduced. Vacuum rating is expressed when expansion joint is at neutral length.
3. Weights are approximate.
4. The degree of angular movement is based on the maximum rated extension.
5. Torsional movement is expressed when the expansion joint is at neutral length.
6. To determine “end thrust,” multiply thrust factor by operating pressure of system.
7. Limit rod control unit weight consists of one rod with washers, nuts and two limit rod plates. Multiply number of limit rods needed for the application (as specified in the Fluid Sealing Association’s Technical Handbook, 7.3 Edition or table 5 in this manual) to determine correct weights.
8. When limit/Control Units are required, use additional set of retaining rings on back side of mating flange when connecting to PVC, CPVC or FRP to improve stiffness.

 

Table 4

Standard Drilling for PROCO Rubber Expansion JointsThickness of Materials for PROCO Rubber Expansion JointsControl Unit Plate Detail

 

 

Nominal Pipe Size Expansion Joint I.D.
Inch / (mm)

Flange Dimensions 2Material Thickness 1 for Bolt Length Requirements

Control Rod 6 Plate O.D.
Inch / (mm)

Maximum 7 Rod Diameter
Inch / (mm)

Flange O.D.
Inch / (mm)

Bolt Circle
Inch / (mm)

Number of Holes

Size of Holes
Inch / (mm)

Retaining Rings Thickness
Inch / (mm)

Rubber Flange Thickness
Inch / (mm)

Adjacent3 Mating Flange Thickness

Max. Control 4 Rod Plate Thickness
Inch / (mm)

1.5(40)5.00(127.00)3.88(98.55)40.625(15.9)0.375(9.53)0.375(9.53)Customer to specify mating flange thickness0.375(9.53)9.125(231.8)0.625(15.9)
2(50)6.00(152.40)4.75(120.65)40.750(19.05)0.375(9.53)0.375(9.53)0.375(9.53)10.125(257.2)0.625(15.9)
2.5(65)7.00(177.80)5.50(139.70)40.750(19.05)0.375(9.53)0.375(9.53)0.375(9.53)11.125(282.6)0.625(15.9)
3(80)7.50(190.50)6.00(152.40)40.750(19.05)0.375(9.53)0.375(9.53)0.375(9.53)11.625(295.3)0.625(15.9)
4(100)9.00(228.60)7.50(190.50)80.750(19.05)0.375(9.53)0.375(9.53)0.375(9.53)13.125(333.4)0.625(15.9)
5(125)10.00(254.00)8.50(215.90)80.875(22.23)0.375(9.53)0.375(9.53)0.500(12.70)14.125(358.8)0.625(15.9)
6(150)11.00(179.40)9.50(241.30)80.875(22.23)0.375(9.53)0.375(9.53)0.500(12.70)15.125(384.2)0.625(15.9)
8(200)13.50(342.90)11.75(298.45)80.875(22.23)0.375(9.53)0.390(10)0.750(19.05)19.125(485.8)1.000(25.4)
10(250)16.00(406.40)14.25(361.95)121.000(25.40)0.375(9.53)0.625(15.88)0.750(19.05)21.625(549.3)1.000(25.4)
12(300)19.00(482.60)17.00(431.80)121.000(25.40)0.375(9.53)0.625(15.88)0.750(19.05)24.625(625.5)1.000(25.4)
14(350)21.00(533.40)18.75(476.25)121.125(28.58)0.375(9.53)0.625(15.88)0.750(19.05)26.625(676.3)1.000(25.4)
16(400)23.50(596.90)21.25(539.75)161.125(28.58)0.375(9.53)0.625(15.88)0.750(19.05)30.125(765.2)1.250(31.8)
18(450)25.00(635.00)22.75(577.85)161.250(31.75)0.375(9.53)0.625(15.88)0.750(19.05)31.625(803.3)1.250(31.8)
20(500)27.50(698.50)25.00(635.00)201.250(31.75)0.375(9.53)0.625(15.88)0.750(19.05)34.125(866.8)1.250(31.8)

Metric Conversion Formula: Nominal I.D.: in. x 25 = mm; Dimensions/Thickness’: in. x 25.4 = mm.

Notes:
1. Limit/Control Rod length is determined by neutral length of rubber expansion joint, rated extension, control rod plate thickness, mating flange thickness and number of nuts. Consult PROCO for rod lengths.
2. Flange Dimensions shown are in accordance with ANSI B16.1 and ANSI B16.5 Class 125/150, AWWA C-207-07, Tbl 2 and 3 – Class D, Table 4 – Class E. Hole size shown is 1/8” larger than AWWA Standard.
3. Adjacent mating flange thickness is required to determine overall rod length and compression sleeve length (if required).
4. Plate thickness is based on a maximum width PROCO would use to design a Limit/Control Rod plate.
5. Flat Washers required at ring splits and are by others.
6. Control rod plate O.D. installed dimension is based on a maximum O.D. Proco would supply.
7. Control rod diameter is based on a maximum diameter Proco would use to design a control rod

 

Table 5Maximum Surge or Test Pressure of the Systems

Nominal Pipe Size Expansion Joint I.D.
Inch / (mm)

Number of Control Rods Recommended
2468
2(50)661
2.5(65)529
3(75)441
4(100)311622
5(125)235470
6(150)186371
8(200)163326
10(250)163325488
12(300)160320481
14(350)112223335
16(400)113227340453
18(450)94187281375
20(500)79158236315

A control rod unit consists of limit rods, tie rods, or compression sleeves, and a control unit assembly is a system of two or more control rod units placed across an expansion joint from flange to flange. Their purpose is to minimize possible damage caused by possible excessive motion of a pipeline. Control unit assemblies can be set at the maximum allowable expansion and / or contraction of the rubber expansion joint.

When used properly, control unit assemblies serve as additional safety enhancements, and can minimize possible damage due to adjacent equipment.

Rubber expansion joints should be installed between two fixed anchor points in a piping system. When proper anchoring can’t be provided, control units are required. When an un-anchored piping system is encountered, nuts should be tightened securely against the rod plate, to prevent over-extension due to pressure thrust caused by the expansion joint.

Listed below are three control unit configurations supplied by PROCO, that are commonly used with rubber expansion joints in piping systems.

  • Figure 1: Limit Rod. A limit rod control unit configuration will allow an expansion joint to lengthen to a predetermined extension setting. Spherical washers can also be furnished, upon request, to prevent any “nut to plate” binding during offset.
  • Figure 2: Limit / Control Rod. This type of configuration is used to allow specified pipe expansion (expansion joint axial compression) and pipe contraction (expansion joint axial extension) movements. Spherical washers can also be furnished, upon request, to prevent any “nut to plate” binding during offset.
  • Figure 3: Compression Sleeve. A compression sleeve configuration is used to allow for specified pipe expansion (expansion joint axial compression) and pipe contraction (expansion joint extension) movements. PROCO will supply each compression sleeve equipped to prevent any axial movement, unless otherwise specified at the time of purchase. Spherical washers can also be furnished, upon request, to prevent any “nut to plate” binding during offset.

For more information on PROCO control unit specifications, download our Series 262R Brochure.

For up-to-date pricing and availability information, contact PROCO today.

In order to properly and successfully install a Proco Style 262R non-metallic expansion joints with beaded end flanges, specific conditions must be met. It’s also important to ensure the process is implemented using the guidelines set forth in our brochure. Contact Proco for additional advice if the system requirements exceed those of the expansion joint selected.

For detailed information on service conditions, proper alignment, anchoring, and storage techniques, download the Proco Style 262R Brochure.

Proco Style 262R wide arch expansion joints are specifically designed for use with plastic or FRP piping systems. They’re a suitable replacement for standard spool-type expansion joints, and possess exceptionally low spring rates compared to their conventional counterparts. With low forces to compress, extend, or laterally offset, these expansion joints can be used on plastic or FRP pipes, pumps, valves or tanks without fear of the expansion joint being stronger than the plastic or FRP pipe, pump, valve or tank flanges.

When pairing Style 262R expansion joints with standard control units utilizing control/gusset plates, a stiffener ring is required, in order to reinforce the mating flange. This technique distributes the pressure thrust loads experienced by the control units across the flange, as opposed to a standard installation where the loads are localized at the points of contact between the control/gusset plate and flange.

For more detailed information, download the Proco Style 262R Brochure.