PSS Flange & Bladder System

PSS Flange & Bladder System

Available in aluminum, steel or stainless steel.

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Product Specifications: PSS Flange & Bladder Dimensions

A large number of commercial vessels are manufactured with a multi bolt flange in lieu of a stern tube . Very often these flanges have a standard bolt pattern. In order to facilitate the installation of the PSS Shaft Seals on boats with these type of flanges, PYI manufactures an array of flanges which fit the "standard" bolt patterns and transform the flange into a stern tube ready to accept the PSS Shaft Seal. These adapters can be ordered as a "standard unit" or as a "inflatable bladder unit". The inflatable bladder option allows the operator to seal the stern tube, while the shaft is not rotating, in order to inspect or clean the seal. Another advantage is that if uncoupling of the shaft is needed, this operation can be done in the water as the shaft can be moved aft with bladder inflated, and no water intrusion will happen. Of course this inflatable bladder can also be used in case of an emergency.

How Does It Work?

Bladder is deflated in PSS Flange & Bladder System

Bladder Deflated

Bladder is deflated allowing water to flow through.

Bladder is inflated in PSS Flange & Bladder System

Bladder Inflated

Bladder is inflated closing off water flow.

Cross Section Of Flange & Bladder System

Section view of the PSS Flange & Bladder System

Components

Bladder for the PSS Flange & Bladder System

Bladder

The PSS stainless steel rotor is slid down the shaft and is secured to the shaft with set screws at 90° for maximum holding power. Precision tolerances are maintained by computer controlled lathes. The faces have a number 9 micro finish and are perpendicular to the bore to prevent run-out as the collar rotates. The carbon graphite stator will polish the face of the rotor during the first few minutes of operation. The stainless steel rotor should not need to be replaced under normal operating conditions. The stainless steel rotor used on the PSS Type A Shaft Seal are made from 316L stainless steel.


Flange

The high density, resin impregnated carbon/graphite stator is a space age composite that is first mixed, molded and then formed under pressure. The blanks are then baked, machined and lapped. The face of our carbon is finished to a flatness of 4 helium light bands (measured .000044" of variation over entire lapped surface). The grade of carbon used in the PSS has an operating temperature over 500° Fahrenheit (+260° Celsius), and cannot melt if the seal runs dry, unlike a rubber lip seal or plastic face seal. The high density of the carbon greatly increases the longevity and wear resistance. Several commercial vessels have recorded over 40,000 (over 4-1/2 years of continuous operation) engine hours on the same, original components. The carbon should not need to be replaced under normal operating conditions.

Flange of the PSS Flange & Bladder System


Dimensions

Here are dimensions of our standard PSS Flange & Bladder Systems. If you don't see one that will work for you we can custom make them. Feel free to contact us for more information.

Part # Shaft Ø Stern Tube Ø Bolt Circle Bolt Hole Size Flange Blank Size Flange Finished Length Flange ID Flange OD Flange Thickness Hole Spacing Inflatable Bladder ID # of Bolt Holes
07-BF212-312-A 2-1/2"
63.5mm
3-1/2"
88.9mm
5"
127mm
9/16"
14.29mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
2-7/8"
50.8mm
6-1/4"
158.75mm
7/16"
11.113mm
30/60 2-7/8"
50.8mm
8
07-BF300-412-A 3"
76.2mm
4-1/2"
114.3mm
6-1/4"
158.75mm
11/16"
17.463mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
3-3/8"
85.725mm
7-1/2"
190.5mm
7/16"
11.113mm
30/60 3-3/8"
85.725mm
8
07-BF314-514-A 3-1/4"
82.55mm
5-1/4"
127mm
6-1/4"
158.75mm
11/16"
17.463mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
3-5/8"
92.075mm
7-1/2"
190.5mm
7/16"
11.113mm
30/60 3-5/8"
92.075mm
8
07-BF312-514-A 3-1/2"
88.9mm
5-1/4"
127mm
6-3/4"
171.45mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
3-7/8"
98.425mm
8-1/8"
206.375mm
5/8"
15.875mm
30/60 3-7/8"
98.425mm
8
07-BF334-514-A 3-3/4"
95.25mm
5-1/4"
127mm
6-3/4"
171.45mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-1/8"
104.775mm
8-1/8"
206.375mm
5/8"
15.875mm
30/60 4-1/8"
104.775mm
8
07-BF400-600-A 4"
101.6mm
6"
152.4mm
7-1/4"
184.15mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-3/8"
111.125mm
8-5/8"
219.075mm
5/8"
15.875mm
30/60 4-3/8"
111.125mm
8
07-BF414-600-A 4-1/4"
107.95mm
6"
152.4mm
7-1/4"
184.15mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-5/8"
117.475mm
8-5/8"
219.075mm
5/8"
15.875mm
30/60 4-5/8"
117.475mm
8
07-BF412-600-A 4-1/2"
114.3mm
6"
152.4mm
8"
203.2mm
11/16"
17.463mm
4-1/4"x10"
107.95x254mm
4-1/8"
104.775mm
4-7/8"
123.825mm
9-3/8"
238.125mm
13/16"
20.6375mm
30/60 4-7/8"
123.825mm
8
07-BF434-700-A 4-3/4"
120.65mm
7"
177.8mm
8"
203.2mm
11/16"
17.463mm
4.375"x10"
111.125x254mm
4-1/4"
107.95mm
5-1/8"
130.175mm
9-3/8"
238.125mm
13/16"
20.6375mm
30/60 5-1/8"
130.175mm
8
07-BF500-700-A 5"
127mm
7"
177.8mm
8-3/4"
222.25mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-3/8"
136.525mm
10-1/8"
257.175mm
13/16"
20.638mm
30/60 5-3/8"
136.525mm
8
07-BF514-700-A 5-1/4"
133.35mm
7"
177.8mm
8-3/4"
222.25mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-5/8"
142.875mm
10-1/8"
257.175mm
13/16"
20.638mm
30/60 5-5/8"
142.875mm
8
07-BF512-700-A 5-1/2"
139.7mm
7"
177.8mm
9-1/4"
234.95mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-7/8"
149.225mm
10-5/8"
269.875mm
13/16"
20.638mm
30/60 5-7/8"
149.225mm
8
07-BF534-700-A 5-3/4"
146.05mm
7"
177.8mm
9-1/4"
234.95mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
6-1/8"
155.575mm
10-5/8"
269.875mm
13/16"
20.638mm
30/60 6-1/8"
155.575mm
8
07-BF600-700-A 6"
152.4mm
7"
177.8mm
10-1/8"
257.175mm
11/16"
17.463mm
4-1/4"x12"
107.95x304.8mm
4-1/8"
104.775mm
6-3/8"
161.925mm
11-3/8"
288.925mm
13/16"
20.638mm
30/60 6-3/8"
161.925mm
8
Part # Shaft Ø Stern Tube Ø Bolt Circle Bolt Hole Size Flange Black Size Flange Finished Length Flange ID Flange OD Flange Thickness Hole Spacing Inflatable Bladder ID # of Bolt Holes
07-BF212-312-S 2-1/2"
63.5mm
3-1/2"
88.9mm
5"
127mm
9/16"
14.29mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
2-7/8"
50.8mm
6-1/4"
158.75mm
7/16"
11.113mm
30/60 2-7/8"
50.8mm
8
07-BF300-412-S 3"
76.2mm
4-1/2"
114.3mm
6-1/4"
158.75mm
11/16"
17.463mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
3-3/8"
85.725mm
7-1/2"
190.5mm
7/16"
11.113mm
30/60 3-3/8"
85.725mm
8
07-BF314-514-S 3-1/4"
82.55mm
5-1/4"
127mm
6-1/4"
158.75mm
11/16"
17.463mm
4"x8"
101.6x203.2mm
3-7/8"
98.425mm
3-5/8"
92.075mm
7-1/2"
190.5mm
7/16"
11.113mm
30/60 3-5/8"
92.075mm
8
07-BF312-514-S 3-1/2"
88.9mm
5-1/4"
127mm
6-3/4"
171.45mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
3-7/8"
98.425mm
8-1/8"
206.375mm
5/8"
15.875mm
30/60 3-7/8"
98.425mm
8
07-BF334-514-S 3-3/4"
95.25mm
5-1/4"
127mm
6-3/4"
171.45mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-1/8"
104.775mm
8-1/8"
206.375mm
5/8"
15.875mm
30/60 4-1/8"
104.775mm
8
07-BF400-600-S 4"
101.6mm
6"
152.4mm
7-1/4"
184.15mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-3/8"
111.125mm
8-5/8"
219.075mm
5/8"
15.875mm
30/60 4-3/8"
111.125mm
8
07-BF414-600-S 4-1/4"
107.95mm
6"
152.4mm
7-1/4"
184.15mm
11/16"
17.463mm
4-1/8"x9"
104.775x228.6mm
4"
101.6mm
4-5/8"
117.475mm
8-5/8"
219.075mm
5/8"
15.875mm
30/60 4-5/8"
117.475mm
8
07-BF412-600-S 4-1/2"
114.3mm
6"
152.4mm
8"
203.2mm
11/16"
17.463mm
4-1/4"x10"
107.95x254mm
4-1/8"
104.775mm
4-7/8"
123.825mm
9-3/8"
238.125mm
13/16"
20.6375mm
30/60 4-7/8"
123.825mm
8
07-BF434-700-S 4-3/4"
120.65mm
7"
177.8mm
8"
203.2mm
11/16"
17.463mm
4.375"x10"
111.125x254mm
4-1/4"
107.95mm
5-1/8"
130.175mm
9-3/8"
238.125mm
13/16"
20.6375mm
30/60 5-1/8"
130.175mm
8
07-BF500-700-S 5"
127mm
7"
177.8mm
8-3/4"
222.25mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-3/8"
136.525mm
10-1/8"
257.175mm
13/16"
20.638mm
30/60 5-3/8"
136.525mm
8
07-BF514-700-S 5-1/4"
133.35mm
7"
177.8mm
8-3/4"
222.25mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-5/8"
142.875mm
10-1/8"
257.175mm
13/16"
20.638mm
30/60 5-5/8"
142.875mm
8
07-BF512-700-S 5-1/2"
139.7mm
7"
177.8mm
9-1/4"
234.95mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
5-7/8"
149.225mm
10-5/8"
269.875mm
13/16"
20.638mm
30/60 5-7/8"
149.225mm
8
07-BF534-700-S 5-3/4"
146.05mm
7"
177.8mm
9-1/4"
234.95mm
11/16"
17.463mm
4-1/4"x11"
107.95x279.4mm
4-1/8"
104.775mm
6-1/8"
155.575mm
10-5/8"
269.875mm
13/16"
20.638mm
30/60 6-1/8"
155.575mm
8
07-BF600-700-S 6"
152.4mm
7"
177.8mm
10-1/8"
257.175mm
11/16"
17.463mm
4-1/4"x12"
107.95x304.8mm
4-1/8"
104.775mm
6-3/8"
161.925mm
11-3/8"
288.925mm
13/16"
20.638mm
30/60 6-3/8"
161.925mm
8

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