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-R	PROCO Material Code	Cover Elastomer	Tube Elastomer	Maximum Operating Temp. °F (°C)	Branding Label Color	F.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 elastomer 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 ¹						Spring Rates			Operating Conditions 2		Weights in lbs³(KGS)
Expansion Joint Size Nom. I.D. x Inch / (mm)	Neutral Length Inch / (mm)	Axial Compression Inch / (mm)	Axial Extension Inch / (mm)	Lateral Deflection Inch / (mm)	Angular Deflection⁴(Degrees)	Torsional Rotation ⁵(Degrees)	Thrust Factor ⁶In2 / (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 Joint	Retaining Ring Set	Control Unit Assembly 7
2 (50)	12 (300)	2.5 (64)	1.25 (32)	1.625 (41)	40	5	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)					40	5	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)					36	5	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)					30	4	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)					30	4	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)					30	4	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)					30	4	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)	20	4	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)	14 (350)	4 (102)	1.625 (41)	1.25 (32)	16	4	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 Joints							Thickness of Materials for PROCO Rubber Expansion Joints							Control Unit Plate Detail
Nominal Pipe Size Expansion Joint I.D. Inch / (mm)		Flange Dimensions ²							Material Thickness 1 for Bolt Length Requirements							Control Rod ⁶Plate O.D. Inch / (mm)		Maximum ⁷Rod Diameter Inch / (mm)
Nominal Pipe Size Expansion Joint I.D. 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 ⁴Rod Plate Thickness Inch / (mm)		Control Rod ⁶Plate O.D. Inch / (mm)		Maximum ⁷Rod Diameter Inch / (mm)
1.5	(40)	5.00	(127.00)	3.88	(98.55)	4	0.625	(15.9)	0.375	(9.53)	0.375	(9.53)	Customer to specify mating flange thickness	0.375	(9.53)	9.125	(231.8)	0.625	(15.9)
2	(50)	6.00	(152.40)	4.75	(120.65)	4	0.750	(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)	4	0.750	(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)	4	0.750	(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)	8	0.750	(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)	8	0.875	(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)	8	0.875	(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)	8	0.875	(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)	12	1.000	(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)	12	1.000	(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)	12	1.125	(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)	16	1.125	(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)	16	1.250	(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)	20	1.250	(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 5		Maximum Surge or Test Pressure of the Systems
Nominal Pipe Size Expansion Joint I.D. Inch / (mm)		Number of Control Rods Recommended
Nominal Pipe Size Expansion Joint I.D. Inch / (mm)		2	4	6	8
2	(50)	661	•	•	•
2.5	(65)	529	•	•	•
3	(75)	441	•	•	•
4	(100)	311	622	•	•
5	(125)	235	470	•	•
6	(150)	186	371	•	•
8	(200)	163	326	•	•
10	(250)	163	325	488	•
12	(300)	160	320	481	•
14	(350)	112	223	335	•
16	(400)	113	227	340	453
18	(450)	94	187	281	375
20	(500)	79	158	236	315

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.