CLA-VAL RF-DBF Manuale di istruzioni

INSTALLATION / OPERATION / MAINTENANCE

Rubber-Flex Duckbill Check Valves

Model RF-DBF

Model RF-DBI-IN Model RF-DBI-LH Model RF-DBJ

Model RF-DBI Model RF-DBO

Page 2 of 13

Table of Contents

1.0 Introduction....................................................................................................................................... 3

1.1 Model RF-DBF: Rubber-Flex Flanged Duckbill Check Valve .................................................... 3

1.2 Model RF-DBI: Rubber-Flex Flanged In-Line Duckbill Check Valve ........................................ 3

1.3 Model RF-DBO: Rubber-Flex Slip-On Duckbill Check Valve .................................................... 3

1.4 Model RF-DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve..................................... 3

1.5 Model RF-DBJ: Rubber-Flex Jacket Style Duckbill Check Valve............................................... 4

1.6 Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve ..................... 4

2.0 Storage and Handling........................................................................................................................ 5

2.1 Storage .......................................................................................................................................... 5

2.2 Handling........................................................................................................................................ 5

3.0 Prior to Installation ........................................................................................................................... 5

3.1 Inspect the Received Check Valve................................................................................................ 5

3.2 Verify the System Parameters....................................................................................................... 5

3.3 Check Valve Mating Surface ........................................................................................................ 5

3.4 Safety Area.................................................................................................................................... 5

4.0 Installation......................................................................................................................................... 6

4.1 Rubber-Flex Check Valve Installation ......................................................................................... 6

4.1.1 ........................... 6

4.1.2 ................ 7

4.1.3 ................................7

4.1.4 ............ 8

4.1.5 ...................... 9

4.1.6 .... 10

4.1.7 Flange Bolt Torqueing (Model RF-DBF/RF-DBI/RF-DBJ & Flanged RF-DBI-LH) .......... 11

4.1.8 Anchor Bolts/Pins (Model RF-DBO/RF-DBI-IN/RF-DBI-LH).......................................... 11

5.0 Operation......................................................................................................................................... 12

6.0 Maintenance.................................................................................................................................... 12

7.0 Appendix A..................................................................................................................................... 13

7.1 Torque Data ................................................................................................................................ 13

7.2 Sample Torqueing Patterns ......................................................................................................... 13

Model RF-DBF: Rubber-Flex Flanged Duckbill Check Valve Installation

Model RF-DBI: Rubber-Flex Flanged In-Line Duckbill Check Valve Installation

Model RF-DBO: Rubber-Flex Slip-On Duckbill Check Valve Installation

Model RF-DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve Installation

Model RF-DBJ: Rubber-Flex Jacket Style Duckbill Check Valve Installation

Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve Installation

Page 3 of 13

1.0 Introduction

1.1 Model RF-DBF: Rubber-Flex Duckbill Check Valve

This type of rubber check valve is designed to bolt directly to existing flanges or

new installations. Flanges are drilled to ANSI 125/150# standard but other drill

patterns are available upon request. This style of rubber check valve can be installed

in either vertical or horizontal applications.

1.2 Model RF-DBI: Rubber-Flex Flanged In-Line Duckbill Check Valve

This type of rubber check valve is designed to fit directly inside of existing piping

systems. The design is supplied with a flat face rubber flange which allows

installation between existing pipe flanges eliminating the requirement for a valve

body. Flanges are drilled to ANSI 125/150# standard but other drill patterns are

available upon request. This style of rubber check valve can be installed in either

vertical or horizontal applications.

1.3 Model RF-DBO: Rubber-Flex Slip-On Duckbill Check Valve

This type of rubber check valve is designed to easily slip over an existing pipe and

is affixed to the pipe with heavy duty stainless steel clamps. This style of rubber

check valve can be installed in either a vertical or horizontal orientation for most

applications. Note: External Clamp shown is of a general style and will change

depending on the size of the supplied check valve.

1.4 Model RF-DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve

This type of rubber check valve is designed to slip directly inside of an existing pipe and is supplied with a stainless steel

expandable clamp to secure in place. This style of rubber check valve can be installed in either a vertical or horizontal

orientation for most applications.

Figure 4: Model RF-DBI-IN

Figure 1: Model RF-DBF

Figure 2: Model RF-DBI

Figure 3: Model RF-DBO

Cla-Val Rubber-Flex Duckbill Check Valves are designed to provide outstanding back-flow prevention; eliminating costly and unwanted

back-flow from rivers, oceans, storm water, and is an excellent choice for sewage diffuser systems. Cla-Val Rubber-Flex Duckbill Check

Valves are fully passive flow devices requiring neither maintenance nor any outside sources of power or manual assistance to operate. They

are offered as direct replacements for ineffective and maintenance ridden flap-type check valves as well as for new/existing construction

and custom applications. Each check valve is manufactured to exacting specifications ensuring a perfect fit and usability and is available in

a wide variety of elastomers to meet the design requirements of the application. This installation, operation and maintenance manual will

cover the general practices for the proper installation, operation and maintenance of the Cla-Val Rubber-Flex Duckbill Check Valves.

Model RF-DBF Rubber-Flex

Flanged Duckbill Check Valve

Model RF-DBI Rubber-Flex Flanged

In-Line Duckbill Check Valve

Model RF-DBO Rubber-Flex

Slip-On Duckbill Check Valve

Model RF-DBI-IN Rubber-Flex

Slip-In In-Line Duckbill Check Valve

RF-DBI-IN Mating Pipe

Page 4 of 13

Model RF-DBI-LH Rubber-Flex Low Head Loss

Flanged In-Line Duckbill Check Valve

1.5 Model RF-DBJ: Rubber-Flex Jacket Style Duckbill Check Valve

Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve

Figure 5: Model RF-DBJ

1.6

Figure 6: Model RF-DBI-LH Rubber-Flex Low Head Loss In-Line Duckbill Check Valve

Figure 7: Model RF-DBI-LH Rubber-Flex Low Head Loss Flanged In-Line Duckbill Check Valve

Note: For flanged versions of Model RF-DBI-LH Low Head Loss In-Line Rubber Check Valves the integrated rubber flange

can be located on either the inlet or discharge end depending on required installation orientation.

This type of rubber check valve is designed with a full metal enclosure (Model RF-DBJ Shroud) which allows easy

installation in existing piping systems. Flanges are drilled to ANSI 125/150# standard but other drill patterns are available

upon request.

Model RF-DBJ Shroud

This type of rubber check valve is designed to slip directly inside of an existing pipe with the supplied stainless steel expandable

clamp or retaining ring to secure in place; it can be fastened from either the inlet or discharge end of the valve. The standard

Model RF-DBI-LH valve must be installed in a truly round pipe. Out of round pipe may cause distortion of the valve causing

valve failure. Model RF-DBI-LH Rubber-Flex

Low Head Loss In-Line Duckbill Check Valve

Page 5 of 13

2.0 Storage and Handling

2.1 Storage

2.1.1 Inside

Figure 8: Typical Check Valve Storage Position

2.1.2 Outside

If the rubber check valve is to be stored outside, keep the check valve protected in a waterproof crate until ready

for installation. Keep the check valve protected from any external elements such as direct UV exposure. Do not

lay other boxes on top of the check valve or check valve box.

2.2 Handling

3.0 Prior to Installation

3.1 Inspect the Received Check Valve

3.2 Verify the System Parameters

Check the system design parameters for the application to ensure the specified/supplied Cla-Val Rubber-Flex Duckbill Check Valve(s)

will meet the system requirements.

3.3 Check Valve Mating Surface

Inspect the mating flange/surface to ensure that it is undamaged and clean and free of all foreign matter before installation of the

check valve. For slip-on style of rubber check valves, the mating pipe must be free of sharp edges which may damage the inside

sealing diameter of the check valve.

3.4 Safety Area

Always check your work area before installation for safety hazards which may cause injury or damage to personnel or product.

Develop and discuss a safety and exit plan for you and your fellow employees in the event of an emergency.

The ideal storage location for a Cla-Val Rubber-Flex Duckbill Check Valve is in a warehouse setting with a

relatively dry and cool location. Store the check valve in a vertical position on a pallet or wooden platform

similar to as shown in Figure 8 below.

Care should be taken when handling the Cla-Val Rubber-Flex Duckbill Check Valves whether big or small to reduce the

possibility of damaging the check valve during installation. For large size check valves, special care should be taken in loading,

hoisting, and lowering; being careful not to hit adjacent equipment, forklift tines, crane cables, etc. Model RF-DBF & RF-DBO

valves 36” and larger are manufactured with a lifting support hole to assist in the safe and proper lifting/installation of these

check valves. The lifting support holes are not intended to support the entire weight of the check valve and care must be taken to

adequately support the cuffed or flanged end as well. Note: Cla-Val will not be responsible or liable for damage to the rubber

check valve, adjacent equipment, or injury to personnel if these steps are not taken.

Rubber-Flex check valves are fully inspected at the factory and are carefully packaged to arrive at the job site ready for

installation. Upon receipt of the check valve(s), inspect for damage that may have occurred during transportation and

immediately contact your transportation company to report any damage. Check the item(s) received against the packing slip to

ensure that all items have been received. For any questions or concerns about the received product contact your Agent or

Cla-Val at [email protected] or for immediate assistance call (800) 942-6326.

Page 6 of 13

4.0 Installation

4.1 Rubber-Flex Check Valve Installation

4.1.1 Model RF-DBF: Rubber-Flex Flanged Duckbill Check Valve Installation

4.1.1.1 Step 1: Align

Position/Align the Flanged Rubber check valve into the system. For horizontal applications the bill

of the check valve should be in vertical orientation relative to the ground unless there are clearance

issues. In the case of clearance issues the check valve may be rotated to a maximum of 35 degrees to

allow clearance to the ground.

Figure 9: Model RF-DBF Installation Step 1

4.1.1.2 Step 2: Retaining Rings

Position the split retaining rings onto the flange of the check valve. Use a flat washer to properly

cover the split in the retaining ring.

Figure 10: Model RF-DBF Installation Step 2

4.1.1.3 Step 3: Flange Bolting

Insert the flange bolting and tighten the flange bolting hardware to a “snug” tight fit before

torqueing. Proceed to section 4.1.7 for proper bolt torqueing and a sample torqueing pattern.

Figure 11: Model RF-DBF Installation Step 3

Note: Each Cla-Val Rubber-Flex Check Valve installation can be considered a major pipe installation and the same safety requirements

as used in pipe contracting installations should be implemented. Each Cla-Val Rubber-Flex Check Valve regardless of size should be

installed in the same manner. Cla-Val will accept no responsibility for an improperly installed Rubber-Flex Check Valve(s) or the

improper use of this product. Incorrect installation may result in injury to personnel, reduced check valve service life and/or damage to

other adjacent equipment.

Page 7 of 13

4.1.2 Model RF-DBI: Rubber-Flex Flanged In-Line Duckbill Check Valve

4.1.2.1 Step 1: Insert

Insert the Slip-In flanged rubber check valve into the existing pipe. For horizontal applications the

bill of the check valve should be installed in a vertical orientation in the mating pipe as shown in

below in Figure 9.

Figure 12: Model RF-DBI Installation Step 1

4.1.2.2 Step 2: Attach

Re-attach the 2 mating pipe flanges.

Figure 13: Model RF-DBI Installation Step 2

4.1.2.3 Step 3: Flange Bolting

Add the flange bolting to the installation and tighten to a “snug” tightfit before torqueing. Proceed

to step 4.1.7 for proper bolt torqueing and a sample torqueing pattern.

Figure 14: Model RF-DBI Installation Step 3

4.1.3 Model RF-DBO: Rubber-Flex Slip-On Duckbill Check Valve Installation

4.1.3.1 Step 1: Slip-On

For Slip-On rubber check valves, slip the rubber check valve over the existing pipe. For horizontal

applications the bill of the check valve must be installed in a vertical orientation relative to the

ground unless there are clearance issues. In the case of clearance issues the check valve may be

rotated to a maximum of 35 degrees to allow clearance to the ground. To ease installation it is

acceptable but not necessary to add soapy water to the exterior of the pipe to facilitate the

installation of the check valve.

Figure 15: Model RF-DBO Installation Step 1

Page 8 of 13

4.1.3.2 Step 2: External Clamps

Add the external clamps to the slip-on rubber check valve. For nominal diameters less than or equal

to 10” the check valve will be supplied with either T-Bolt or Worm Gear Clamps. For nominal

diameters greater than 10”, the check valve(s) will be supplied with fabricated stainless steel

clamp(s). If the valve are supplied with more than one fabricated stainless steel clamp, then rotate

the additional clamps which will place the clamping section at opposite angles from the first clamp.

This will ensure that even pressure is applied to the valve. Note: The supplied number of clamps will

vary depending on size and application.

Figure 16: Model RF-DBO Installation Step 2

4.1.3.3 Step 3: Tighten Clamps

Tighten the external clamp until the rubber is

compressed by the external clamp and a tight fit

is achieved then proceed to section 4.1.8 for

anchor bolting/pinning to anchor the slip-on

check valve to the mating piping.

4.1.4 Model DBI-IN: Rubber-Flex Slip-In In-Line Duckbill Check Valve Installation

4.1.4.1 Step 1: Slip-In

Insert the slip-in check valve inside the existing pipe. For horizontal applications the bill of the

check valve must be installed in vertical orientation as shown below in Figure 15.

Figure 18: Model RF-DBI-IN Installation Step 1

4.1.4.2 Step 2: Insert Clamp

Insert and the expandable internal clamp into the rubber check valve.

Figure 19: Model RF-DBI-IN Installation Step 2

Figure 17: Model RF-DBO Installation Step 3

Page 9 of 13

4.1.4.3 Step 3: Expand Clamp

Tighten the expandable internal clamp until the stainless steel portion of the clamp has imbedded

itself into the rubber of the valve. Tighten the lock nut once the internal expandable clamp is in the

proper position and proceed to section 4.1.8 for anchor bolting/pinning to anchor the slip-in check

valve to the mating pipe. When installing multiple internal expandable clamps ensure the clamps are

evenly spaced/ rotated to provide even clamping pressure as well as the internal expandable fasteners

located in a position that minimizes flow interference. Note: This style of check valve installation

relies on external pressure of the internal expandable clamp to ensure that the valve does not move,

care should be taken to ensure proper sealing.

Figure 20: Model RF-DBI-IN Installation Step 3

4.1.5 Model RF-DBJ: Rubber-Flex Jacket Style Duckbill Check Valve Installation

4.1.5.1 Step 1: Align/Insert

Figure 21: Model RF-DBJ Installation Step 1

4.1.5.2 Step 2: Flange Bolting

Secure the Model RF-DBJ assembly to the mating flanges with the appropriate flange bolting hardware.

Follow the procedures in section 4.1.7 for proper flange bolt torqueing.

Figure 22: Model RF-DBJ Installation Step 2

Align/Insert the Model RF-DBJ Assembly into the required breach opening noting the position of

flow and orientation of the valve. The assembly should be installed to where the top notation on the

Model RF-DBJ shroud is in the vertical position as shown in Figure 21. Use a gasket where required,

supplied by others. Note: Ensure the bill of the check valve is in the vertical position when installed.

Page 10 of 13

4.1.6 Model RF-DBI-LH: Rubber-Flex Low Head Loss In-Line Duckbill Check Valve Installation

4.1.6.1 Slip In Model RF-DBI-LH

4.1.6.1.1 Step 1: Insert Valve

4.1.6.1.2 Step 2: Insert Clamp

Insert the expandable internal clamp(s)

into the rubber check valve in either the

inlet or discharge end depending on

installation orientation and ensuring that

the adjustable bolts are located at the top

of the valve. When installing multiple

internal expandable clamps ensure the

clamps are evenly spaced/ rotated to

provide even clamping pressure as well

as the internal expandable fasteners

located in a position that minimizes flow

interference.

4.1.6.1.3 Step 3: Expand Clamp

Tighten the expandable internal clamp

until the stainless-steel portion of the

clamp has imbedded itself into the rubber

of the valve. Tighten the lock nut once

the internal expandable clamp is in the

proper position and proceed to section

4.1.8 for anchor bolting/pinning to anchor

the slip-in check valve to the mating pipe.

Note: This style of check valve

installation relies on external pressure of

the internal expandable clamp to ensure

that the valve does not move, care should

be taken to ensure proper sealing.

4.1.6.2 Flanged Model RF-DBI-LH

4.1.6.2.1 Step 1: Insert

Figure 23

: Model RF-DBI-LH Installation Step 1

Figure 25: Model RF-DBI-LH Installation Step 3

Figure 26: Model RF-DBI-LH Flanged Installation

Step 1

Figure 24

: Model RF-DBI-LH Installation Step 2

The RF-DBI-LH valve must be installed

in a horizontal pipe and will be supplied

with a “FLOW” direction label and a

“TOP” label to ensure proper installation

orientation within the pipe. Insert the

slip-in check valve inside the existing pipe

and push until inlet/discharge end is flush

with end of pipe.

The RF-DBI-LH valve must be installed

in a horizontal pipe and will be supplied

with a “FLOW” direction label and a

“TOP” label to ensure proper

installation orientation within the pipe.

Insert the slip-in flanged check valve

inside the existing pipe and push until

flanged inlet/discharge end is flush with

end of pipe.

Note: Model RF-DBI-LH Flanged

Check Valve can be supplied with the

integrated rubber flange in the inlet or

discharge position depending on the

required installation parameters.

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