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Proco Series 240 PTFE Lined Insert

Proco Style 240 Spherical Molded PTFE Lined Insert Expansion Joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.

The molded style 240 single sphere designed bellows are inherently stronger than the conventional hand-built style spool arch type. Internal pressure within a “sphere” is exerted in all directions, distributing forces evenly over a larger area. The spherical design “flowing arch” reduces turbulence and sediment buildup.

 

Absorbs Directional Movement

Thermal movements appear in any rigid pipe system due to temperature changes. The Style 240 spherical arch expansion joints allow for axial compression or axial extension, lateral deflection as well as angular movement. (Note: Rated movements in this publication are based on single plane movements. Multiple movement conditions are based on a multiple movement calculation. Contact Proco for information when designing multiple pipe movements.)

 

Easy Installation with Rotating Metallic Flanges

The floating metallic flanges freely rotate on the bellows, compensating for mating flange misalignment, thus speeding up installation time. Gaskets are not required with the Style 240, provided the expansion joints are mated against a flat face flange as required in the installation instructions.

 

Flange Materials/Drilling

The Proco Style 240 molded expansion joints are furnished complete with plated carbon steel flanges for corrosion protection. 304 or 316 stainless steel flanges are available upon request as well as ANSI 2442/300 lb., DIN PN10 and PN16 drilling.

 

Absorbs Vibration, Noise and Shock

The Proco Style 240 molded expansion joints effectively dampen and insulate downstream piping against the transmission of noise and vibration generated by mechanical equipment. Noise and vibration caused by equipment can cause stress in pipe, pipe guides, anchors and other equipment downstream. Water hammer and pumping impulses can also cause strain, stress or shock to a piping system. Install the Style 240 molded expansion joints to help compensate for these system pressure spikes.

 

Wide Service Range with Low Cost

Compared to conventional hand-built spool type joints, you will invest less money when specifying the mass-produced, consistent high quality, molded single sphere expansion joints.

 

Material Identification

All Style 240 molded expansion joints have branded elastomer designations. PTFE Neoprene Cover (NT) elastomer designated joints meet the Coast Guard Requirements and conform to ASTM F4573-4431.

 

Large Inventory

Proco Products, Inc. maintains one of the largest inventories of rubber expansion joints in the world. Please contact us for price and availability.

NOMINAL Pipe Size I.D. Neutral Length PROCO Style Number1 240 Movement Capability: From Neutral Position1 Pressure3 Standard Flange Drilling Dimensions5 Weight in lbs.
Axial Compression Inches Axial Extension Inches Lateral Deflection Inches Angular Deflection Degrees Thrust Factor2 Positive4 PSIG Flange O.D.
Inches		 Colt Circle Inches Number of Holes Size of Holes Inches Exp. Joint & Flanges Control Unit Set (2 Rod)

1
(25)

 5.00 240-C 0.500 0.625 0.562 22 2.21 87 3.13 3.13 4 0.625 3.8 3.3

1.25
(32)

 5.00 240-C 0.500 0.625 0.562 8 3.17 87 4.63 3.5 4 0.625 5.0 3.3

1.5
(40)

 5.00 240-C 0.500 0.625 0.562 22 3.24 87 5.0 3.88 4 0.625 5.1 4.6

2
(50)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562 22 3.53 87 6.0 4.75 4 0.750 7.1 6.3

2.5
(65)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

22
21

 5.52 87 7.0 5.5 4 0.750

10.6
12.0

 7.6

3
(80)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

20
19

 6.68 87 7.5 6.0 4 0.750

13.3
13.8

 8.3

4
(100)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

16
15

 11.34 87 9.0 7.5 8 0.750

16.5
17.5

 7.4

5
(125)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

13
22

 15.01 87 10.0 8.5 8 0.875

20.3
21.8

 8.3

6
(150)

5.00
6.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

11
10

 20.64 87 11.0 9.5 8 0.875

22.6
24.0

 10.4

8
(200)

5.00
6.00

240-C
240-A

0.500
0.562

 0.562 0.562 8 31.81 87 13.5 11.75 8 0.875

35.5
38.5

 13.4

10
(250)

5.00
8.00

240-C
240-A

0.500
0.562

 0.562 0.562

7
6

 51.93 87 16.0 14.25 12 1.000

49.3
53.6

21.0
21.3

12
(300)

5.00
8.00

240-C
240-A

0.500
0.562

0.625
0.562

 0.562

6
5

 68.94 87 19.0 17.0 12 1.000

73.4
80.0

26.5
27.0

NOTES:
1. Movements shown in the above tables are non-concurrent.
2. Calculation of Thrust (Thrust Factor). When expansion joints are installed in the pipeline, the static portion of the thrust is calculated as a product of the area of the I.D. of the arch of the expansion joint times the maximum pressure (design, test or surge) that will occur in the line. The result is a force expressed in pounds. Take design, surge or test pressure X thrust factor to calculate end thrust.
3. Pressure rating is based on 170oF operating temperature. The pressure rating is reduced at higher temperatures.
4. Pressures shown at maximum “operating pressure”. Test pressure is 1.5 times “operating pressure”. Burst pressure is 4 times “operating pressure”. If factory hydro-test is required, an additional joint per size must be purchased and tested. Once hydro-tested this joint may not be sent to field for installation as the beaded end will have taken a (compressed) set and can not be reused.
5. In addition to standard 150 lb. drilled flanges, Proco can provide expansion joints listed above in 300 lb. drilling, Metric PN10 and PN16 drilling.

NOMINAL Pipe Size
Inch / (mm)

American 125/150#
Conforms to ANSI B16.1 and B16.5

American 250/300#
Conforms to ANSI B16.1 and B16.5
Flange Thickness Flange O.D. Bolt Circle No. of Holes Drilled Hole Size Flange Thickness Flange O.D. Bolt Circle No. of Holes Hole Size

1
(25)

0.55
(14.0)

4.25
(108.0)

3.13
(79.4)

 4

0.62
(15.9)

0.63
(16.0)

4.88
(124.0)

3.5
(88.9)

 4

0.75
(19.1)

1.25
(32)

0.55
(14.0)

4.63
(118.0)

3.5
(88.9)

 4

0.62
(15.9)

0.63
(16.0)

5.25
(133.0)

3.88
(98.4)

 4

0.75
(19.1)

1.5
(40)

0.55
(14.0)

5.0
(127.0)

3.88
(98.4)

 4

0.62
(15.9)

0.63
(16.0)

6.12
(156.0)

4.50
(114.3)

 4

0.88
(22.2)

2
(50)

0.63
(16.0)

6.0
(152.0)

4.75
(120.7)

 4

0.75
(19.1)

0.71
(18.0)

6.50
(165.0)

5.00
(127.0)

 8

0.75
(19.1)

2.5
(65)

0.71
(18.0)

7.0
(178.0)

5.5
(139.7)

 4

0.75
(19.1)

0.71
(18.0)

7.5
(191.0)

5.88
(149.2)

 8

0.88
(22.2)

3
(80)

0.71
(18.0)

7.5
(191.0)

6.0
(152.4)

 4

0.75
(19.1)

0.79
(20.0)

8.25
(210.0)

6.62
(168.2)

 8

0.88
(22.2)

4
(100)

0.71
(18.0)

9.0
(229.0)

7.5
(190.5)

 8

0.75
(19.1)

0.79
(20.0)

10.0
(254.0)

7.88
(200.0)

 8

0.88
(22.2)

5
(125)

0.79
(20.0)

10.0
(254.0)

8.5
(215.9)

 8

0.88
(22.2)

0.87
(22.0)

11.0
(279.0)

9.25
(235.0)

 8

0.88
(22.2)

6
(150)

0.87
(22.0)

11.0
(279.0)

9.5
(241.3)

 8

0.88
(22.2)

0.87
(22.0)

12.5
(318.0)

10.62
(269.9)

 12

0.88
(22.2)

8
(200)

0.87
(22.0)

13.5
(343.0)

11.75
(298.5)

 8

0.88
(22.2)

0.95
(24.0)

15.0
(381.0)

13.0
(330.2)

 12

1.00
(25.4)

10
(250)

0.95
(24.0)

16.0
(406.0)

14.25
(362.0)

 12

1.00
(25.4)

1.02
(26.0)

17.5
(445.0)

15.25
(387.4)

 16

1.13
(28.6)

12
(300)

0.95
(24.0)

19.0
(483.0)

17.0
(431.8)

 12

1.00
(25.4)

1.02
(26.0)

20.5
(521.0)

17.75
(450.9)

 16

1.25
(31.8)

 

NOMINAL Pipe Size

Inch / (mm)

Metric Series

Conforms to I.S.O. 2084-1974 Table NP10 Holes to I.S.O. /R-273

Metric Series

Conforms to I.S.O. 2084-1974 Table NP16 Holes to I.S.O. /R-273
Flange Thickness Flange O.D. Bolt Circle No. of Holes Drilled Hole Size Flange Thickness Flange O.D. Bolt Circle No. of Holes Hole Size

1
(25)

0.63
(16.0)

4.53
(115.0)

3.35
(85.0)

 4

0.55
(14.0)

0.63
(16.0)

4.53
(115.0)

3.5
(85.0)

 4

0.55
(14.0)

1.25
(32)

0.63
(16.0)

5.51
(140.0)

3.94
(85.0)

 4

0.71
(18.0)

0.63
(16.0)

5.51
(140.0)

3.94
(100.0)

 4

0.71
(18.0)

1.5
(40)

0.63
(16.0)

5.91
(150.0)

4.33
(110.0)

 4

0.71
(18.0)

0.63
(16.0)

5.91
(150.0)

4.33
(110.0)

 4

0.71
(18.0)

2
(50)

0.71
(18.0)

6.50
(165.0)

4.92
(125.0)

 4

0.71
(18.0)

0.71
(18.0)

6.50
(165.0)

4.92
(125.0)

 4

0.71
(18.0)

2.5
(65)

0.71
(18.0)

7.25
(185.0)

5.71
(145.0)

 4

0.71
(18.0)

0.71
(18.0)

7.28
(185.0)

5.71
(145.0)

 4

0.71
(18.0)

3
(80)

0.79
(20.0)

7.87
(200.0)

6.3
(160.0)

 8

0.71
(18.0)

0.79
(20.0)

7.87
(200.0)

6.30
(160.0)

 8

0.71
(18.0)

4
(100)

0.79
(200)

8.66
(220.0)

7.09
(180.0)

 8

0.71
(18.0)

0.79
(20.0)

8.66
(220.0)

7.09
(180.0)

 8

0.71
(18.0)

5
(125)

0.87
(22.0)

9.84
(250.0)

8.27
(210.0)

 8

0.71
(18.0)

0.87
(22.0)

9.84
(250.0)

8.27
(210.0)

 8

0.71
(18.0)

6
(150)

0.87
(22.0)

11.22
(285.0)

9.45
(240.0)

 8

0.87
(22.0)

0.87
(22.0)

11.22
(285.0)

9.45
(240.0)

 8

0.87
(22.0)

8
(200)

0.87
(22.0)

13.39
(340.0)

11.61
(295.0)

 8

0.87
(22.0)

0.87
(22.0)

13.39
(340.0)

11.61
(295.0)

 12

0.87
(22.0)

10
(250)

1.02
(26.0)

15.55
(395.0)

13.78
(350.0)

 12

0.87
(22.0)

1.02
(26.0)

15.94
(405.0)

13.98
(355.0)

 12

1.02
(26.0)

12
(300)

1.02
(26.0)

17.52
(445.0)

15.75
(400.0)

 12

0.87
(22.0)

1.02
(26.0)

18.11
(460.0)

16.14
(410.0)

 12

1.02
(26.0)
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 1 Material Thickness 2 for Bolt Length Requirements

Flange O.D.
Inch / (mm)

Bolt Circle
Inch / (mm)

 Number of Holes

Size of Holes
Inch / (mm)

Nominal Flange / Beaded End Thickness
Inch / (mm) (Approx. Value)

 Adjacent Mating 3 Flange Thickness

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

Control Rod 5 Plate O.D.
Inch /(mm)

Maximum 6 Rod Diameter
Inch / (mm)

1
(25)

4.25
(108.00)

3.13
(79.50)

 4

0.625
(15.87)

1.25
(31.75)

 Customer to specify flange thickness

0.375
(9.53)

8.375
(215.9)

0.625
(15.9)

1.25
(32)

4.63
(118.00)

3.5
(88.90)

 4

0.625
(15.87)

1.25
(31.75)

0.375
(9.53)

8.750
(222.3)

0.625
(15.9)

1.5
(40)

5.0
(127.00)

3.88
(98.55)

 4

0.625
(15.87)

1.25
(31.75)

0.375
(9.53)

9.125
(231.8)

0.625
(15.9)

2
(50)

6.00
(152.00)

4.75
(120.65)

 4

0.750
(19.05)

1.25
(31.75)

0.375
(9.53)

10.125
(257.2)

0.625
(15.9)

2.5
(65)

7.00
(178.00)

5.50
(139.70)

 4

0.750
(19.05)

1.25
(31.75)

0.375
(9.53)

11.125
(282.6)

0.625
(15.9)

3
(80)

7.50
(191.00)

6.00
(152.40)

 4

0.750
(19.05)

1.25
(31.75)

0.375
(9.53)

11.625
(295.3)

0.625
(15.9)

4
(100)

9.00
(229.00)

7.50
(190.50)

 8

0.750
(19.05)

1.25
(31.75)

0.375
(9.53)

13.125
(333.4)

0.625
(15.9)

5
(125)

10.000
(254.00)

8.50
(215.90)

 8

0.875
(22.23)

1.50
(38.10)

0.500
(12.70)

14.125
(358.8)

0.625
(15.9)

6
(150)

11.00
(279.00)

9.50
(241.30)

 8

0.875
(22.23)

1.50
(38.10)

0.500
(12.70)

15.125
(384.2)

0.625
(15.9)

8
(200)

13.50
(343.00)

11.75
(298.45)

 8

0.875
(22.23)

1.50
(38.10)

0.750
(19.05)

19.125
(485.8)

1.000
(25.4)

10
(250)

16.00
(406.00)

14.25
(361.95)

 12

1.000
(25.40)

1.50
(38.10)

0.750
(19.05)

21.625
(549.3)

1.000
(25.4)

12
(300)

19.00
(483.00)

17.00
(431.80)

 12

1.000
(25.40)

1.50
(38.10)

0.750
(19.05)

24.625
(625.5)

1.000
(25.4)

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

Notes:
1. 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.
2. 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.
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. Control rod plate O.D. installed dimension is based on a maximum O.D. Proco would supply.
6. Control rod diameter is based on a maximum diameter Proco would use to design a control rod.

Important Control Unit Considerations

The number of rods, control rod diameters and control rod plate thicknesses are important considerations when specifying control units for an application. As a minimum, specifying engineers or purchasers shall follow the guidelines as set forth in Appendix C of the Fluid Sealing Association’s Technical Handbook, Seventh Edition. PROCO engineers its control unit assemblies to system requirements. Our designs incorporate an allowable stress of 65% of material yield for each rod and plate (rod and plate material to be specified by purchaser). Therefore, it is important to provide pressure and temperature ratings to PROCO when requesting control units for rubber expansion joints. It is also important to provide adjacent mating flange thickness or mating specifications to ensure correct rod lengths are provided.

Installation Instructions for Limit Rods

  1. Assemble expansion joint between pipe flanges in its manufactured face-to-face length. Install the retaining rings furnished with the expansion joint.
  2. Assemble control rod plates behind pipe flanges as shown. Flange bolts or all thread studs through the control rod plate must be longer to accommodate the plate thickness. Control rod plates should be equally spaced around the flange. Depending upon the size and pressure rating of the system, 2, 3, 4, or more control/limit rods may be required. Refer to Table 4 in this manual or to the Fluid Sealing Association’s Technical Handbook, Seventh Edition, for control rod pressure ratings.
  3.  Insert control/limit rods through top plate holes. Steel flat washers are to be positioned at outer plate surface.
  4. If a single nut per unit is furnished, position this nut so that there is a gap between the nut and the steel flat washer. This gap is equal to the joint’s maximum extension (commencing with the nominal face-to-face length). To lock this nut in position, either “stake” the thread in two places or tack weld the nut to the rod. If two nuts are supplied, the nuts will create a “jamming” effect to prevent loosening. (Nuts should be snug against flat washer and control rod plate when piping system is un-anchored.)Note: Consult the manufacturer if there are any questions as to the rated compression and elongation. These two dimensions are critical in setting the nuts and sizing the compression pipe sleeve (if supplied).
  5. If there is a requirement for compression pipe sleeves, ordinary pipe may be used, sized in length to allow the joint to be compressed to its normal limit.
  6. If there is a requirement for optional spherical washers, these washers are to be positioned at outer plate surface and backed up by movable double nuts.

1. Service Conditions:

Make sure the expansion joint rating for temperature, pressure, vacuum*, movements and selection of elastomeric materials match the system requirements. Contact the manufacturer if the system requirements exceed those of the expansion joint selected.

(*Vacuum service for spherical rubber connectors: Vacuum rating is based on neutral installed length. These products should not be installed “extended” on vacuum applications.)

2. Alignment:

Expansion joints are not designed to make up for piping misalignment errors. Piping misalignment should be no more than 1/8” in any direction. Misalignment of an expansion joint will reduce the rated movements and can induce severe stress of the material properties, thus causing reduced service life.

3. Anchoring:

Anchors are required wherever the piping system changes direction. Expansion joints should be located as close as possible to anchor points. If an anchoring system is not used, it is recommended that control rods be installed on the expansion joint to prevent excessive movements from occurring due to pressure thrust of the line.

4. Pipe Support:

Piping must be supported so expansion joints do not carry any pipe weight.

5. Mating Flanges:

Install the expansion joint against the mating pipe flanges and install bolts so that the bolt head is against the expansion joint flange. Flange-to-flange dimension of the expansion joint must match the breech opening*. (*A spherical rubber connector must be compressed 1/8” to 3/16” during installation in order to obtain a correct installed face-to-face dimension.)

Make sure the mating flanges are clean and are a flat-faced type. When attaching beaded end flange expansion joints to raised face flanges, the use of metal gaskets are required to prevent metal flange faces from cutting rubber bead during installation.

Never install expansion joints next to wafer type check or butterfly valves. Serious damage to the rubber flange bead can result due to lack of flange mating surface and/or bolt connection.

6. Bolting Torque:

Table 8 shows the recommended torque values for non-metallic expansion joints with beaded end type-flanges: Tighten bolts in stages by altering around the flange. Use the recommended torque values in Table 8 to achieve a good seal. Never tighten an expansion joint to the point that there is metal-to-metal contact between the expansion joint flanges and the mating flanges. A slight bulge in the rubber beaded end should create a flush tight seal.

Note: Torque values are approximate due to mating flange surfaces, installation offsets, operating pressures and environmental conditions.

7. Storage:

Ideal storage is in a warehouse with a relatively dry, cool location. Store flanges face down on a pallet or wooden platform. Do not store other heavy items on top of the expansion joints. Ten year shelf life can be expected with ideal conditions. If storage must be outdoors, place on a wooden platform and joints should not be in contact with the ground. Cover with a tarpaulin.

8. Large Joint Handling:

Do not lift with ropes or bars through the bolt holes. If lifting through the bore, use padding or a saddle to distribute the weight. Make sure cables or forklift tines do not contact the rubber. Do not let expansion joints sit vertically on the edges of the flanges for any period of time.

9. Additional Tips:

A. Do not insulate over a non-metallic expansion joint. This facilitates inspection of the tightness of the joint bolting.

B. It is acceptable (but not necessary) to lubricate the expansion joint flanges with a thin film of graphite dispersed in glycerin or water to ease disassembly at a later time.

C. Do not weld in the near vicinity of a non-metallic joint.

D. If expansion joints are to be installed underground, or will be submerged in water, contact manufacturer for specific recommendations.

E. If the expansion joint will be installed outdoors, make sure the cover material will withstand ozone, sunlight, etc.

F. Check the tightness of lead-free flanges two or three weeks after installation and retighten if necessary.

Warning: Expansion joints may operate in pipelines or equipment carrying fluids and/or gasses at elevated temperature and pressures and may transport hazardous materials. Precautions should be taken to protect personnel in the event of leakage or splash. Rubber joints should not be installed in areas where inspection is impossible. Make sure proper drainage is available in the event of leakage when operating personnel are not available.