SUBSEA PRESSURE COMPENSATORS  
 
Download PDF of this page
Download Adobe Reader

Designed to balance the internal pressure of oil filled subsea equipment and hydraulic systems with the ambient pressure of the surrounding sea water, Tecnadyne’s PCX pressure compensators have been proven in the world’s harshest subsea environments for many years.

The PCX pressure compensators are compatible with all common hydraulic oils and are rated for operation to full ocean depth.

Employing a spring loaded rolling diaphragm, made from a high strength fabric reinforced neoprene material, the PCX pressure compensators maintain the internal oil pressure 4-7psi (0.25-0.5 bar) above ambient. In the event of a leak in the customer’s oil filled system, the slightly higher pressure of the internal oil prevents water intrusion, thereby protecting the internal equipment from water damage. And since the rolling diaphragm of the PCX pressure compensators eliminates all piston and rod seals, leaks are virtually eliminated for the highest reliability.

The housings of the PCX pressure compensators are manufactured from hard anodized 6061-T6 aluminum and the spring and all hardware are made from passivated 18-8 stainless steel. Optional housing materials include Type 303/321 stainless steel and 3Al2.5V titanium.

             
Model
PC1X

DISPLACE-MENT
1.3 cu. in.
.021 liters

A
Cylinder
1.75 in. sq.
44.5mm sq.

 

C
Cap
 .87 in
22.1 mm
 

E
Cylinder
 1.68 in
42.7 mm

F
Rod
 1.24 in
31.5 mm
Model
PC2X		 DISPLACE-MENT
3.5 cu. in.
.057 liters
A
Cylinder
2.00 in. sq.
50.8 mm sq.
 

C
Cap
 1.37 in
34.8 mm
 

E
Cylinder
 2.68 in
68.1 mm

F
Rod
 2.24 in
56.9 mm
Model
PC3X		 DISPLACE-MENT
13.6 cu. in.
.223 liters

A
Cylinder
 Ø2.50 in
Ø63.5 mm

B
Flange
 Ø3.25 in
Ø82.6 mm

C
Cap
 2.12 in
53.8 mm

D
Flange
 .40 in
10.2 mm

E
Cylinder
 4.18 in
106.2 mm

F
Rod
 3.74 in
95.0 mm
Model
 PC4X		 DISPLACE-MENT
19.2 cu. in.
.315 liters

A
Cylinder
 Ø2.75 in
Ø69.9 mm 
B
Flange
 Ø3.50 in
Ø88.9 mm

C
Cap
 2.37 in
60.2 mm

D
Flange
 .40 in
10.2 mm

E
Cylinder
 4.68 in
118.9 mm

F
Rod
 4.24 in
107.7 mm
Model
PC5X		 DISPLACE-MENT
23.2 cu. in.
.381 liters

A
Cylinder
 Ø3.00 in
Ø76.2 mm 
B
Flange
 Ø3.75 in
Ø95.3 mm

C
Cap
 2.45 in
62.2 mm

D
Flange
 .40 in
10.2 mm

E
Cylinder
 4.93 in
125.1 mm

F
Rod
 4.40 in
111.8 mm
Model
PC6X		 DISPLACE-MENT
65.0 cu. in.
1.065 liters

A
Cylinder
 Ø4.25 in
Ø108.0 mm 
B
Flange
 Ø5.00 in
Ø127.0 mm

C
Cap
 3.57 in
90.8 mm

D
Flange
 .53 in
13.3 mm

E
Cylinder
 7.05 in
179.1 mm

F
Rod
 6.40 in
162.6 mm
Model
PC7X		 DISPLACE-MENT
82.3 cu. in.
1.349 liters

A
Cylinder
 Ø4.50 in
Ø114.3 mm
B
Flange
 Ø5.25 in
Ø133.4 mm

C
Cap
 3.87 in
98.2 mm

D
Flange
 .53 in
13.3 mm

E
Cylinder
 7.61 in
193.3 mm

F
Rod
 6.98 in
177.3 mm
Model
PC8X 		 DISPLACE-MENT
105 cu. in.
1.73 liters

A
Cylinder
 Ø5.00 in
Ø127.0 mm 
B
Flange
 Ø5.75 in
Ø146.1 mm

C
Cap
 4.10 in
104.0 mm

D
Flange
 .78 in
19.7 mm

E
Cylinder
 8.21 in
208.4 mm

F
Rod
 7.44 in
189.0 mm
Model
PC9X		 DISPLACE-MENT
150 cu. in.
2.45 liters

A
Cylinder
 Ø5.50 in
Ø139.7 mm 
B
Flange
 Ø6.25 in
Ø158.8 mm

C
Cap
 4.60 in
116.7 mm

D
Flange
 .78 in
19.7 mm

E
Cylinder
 9.21 in
233.8 mm

F
Rod
 8.44 in
214.4 mm
Model
PC10X
DISPLACE-MENT
271 cu. in.
4.44 liters

A
Cylinder
 Ø6.50 in
Ø165.1 mm

B
Flange
 Ø7.25 in
Ø184.2 mm

C
Cap
 5.72 in
145.3 mm

D
Flange
 .78 in
19.7 mm

E
Cylinder
 11.33 in
287.8 mm

F
Rod
 10.44 in
265.2 mm
Model
PC11X		 DISPLACE-MENT
452 cu. in.
7.40 liters

A
Cylinder
 Ø8.25 in
Ø209.6 mm

B
Flange
 Ø9.00 in
Ø228.6 mm

C
Cap
 5.97 in
151.6 mm

D
Flange
 1.025 in
26.0 mm

E
Cylinder
 11.83 in
300.5 mm

F
Rod
 10.94 in
277.9 mm
Model
PC12X		 DISPLACE-MENT
587 cu. in.
9.62 liters

A
Cylinder
 Ø8.75 in
Ø222.3 mm

B
Flange
 Ø9.50 in
Ø241.3 mm

C
Cap
 6.72 in
170.7 mm

D
Flange
 1.025 in
26.0 mm

E
Cylinder
 13.33 in
338.6 mm

F
Rod
 12.44 in
316.0 mm
Specifications subject to change without notice