The Cost-effective Rubber Duckbill Valve

Rubber Duckbill valve: 1.Quiet Operation 2.Zero maintenance 3.Design prevents backflow 4.Will seal around solids The Cost-effective Rubber Duckbill Valve: 1.Quiet operation2.Zero maintenance3.Design prevents backflow4.Will seal around solids Product Introduction:

Rubber Duckbill valve is custom made and is intended for specific applications.It is  designed to respond to criteria unique to its purpose,such as line pressure,backflow pressures,and chemical compatibility.

Should the conditions be altered or changed significantly,it could affect the normal operation of the Rubber duckbill valve. Rubber Duckbill Valve operates based on differential pressure,When the line pressure(at the valve inlet)exceeds the backpressure(at the valve outlet),the valve opens and flow is created.When the backpressure exceeds or overcomes the line pressure,the bill of the Rubber duckbill valve seals shut,thereby preventing any backflow from occurring.

Installation:

 1.Ensure that pipelines have been depressurized prior to installation,removal,or servicing the Rubber duckbill valve.For best performance,bills should bu installed as close to the vertical position as possible,In cases where clearance below the pipe outlet is minimal,the Duckbill should be rotated only enough as required to avoid contact with the ground.

1.Do not install against raised-face flanges(only to smooth-face flanges).Remove all burrs or sharp edges from the pipe flange faces and wipe clean of oil,grease,etc.Apply a thin coat of graphite or glycerine to the pipe flange face,This will ease installation and allow for easy removal at a later date.

2.Lift the Rubber Duckbill valve into position and align the bolt holes of the pipe flange,Rubber Duckbill valve flange and the retaining ring.Ensure that the Rubber Duckbill Valve's bill is oriented in a vertical position.

3.After the Rubber Duckbill Valve and retaining ring(where applicable) are in the correct position,push two bolts through to ensure alignment.After the proper alignment has been obtained,install the remaining nuts and bolts using washer at the split holes(if the Rubber Duckbill valve comes with retaining ring).

4.Use two wrenches when installing the Rubber Duckbill Valve.Tighten all flange bolts in a criss-cross pattern similar to the one shown in Figure 2 to the maximum torque recommended in Figure 3.

5.Do not weld near the Rubber Duckbill Valve

Main data:

Matching Pipeline Diameter	Valve Step (A)	Pipeline Touching (B)
1/2'-3/4'	15	15
1'-1-1/4'	20	20
1-1/2-2-1/2	25	25
3'	40	40
4'	50	50
6'	50	50
8'	50	50
10'	50	50
12'-14'	100	100
16'-20'	150	150
24'-36'	200	200
42'	250	250
48'-60'	300	300
72'	400	400

The Cost-effective Rubber Duckbill Valve