Secondary Roof Seals for Floating Roof Storage Tanks

Nayflex Seal MN30

Secondary Seal for Welded Tanks
Proven reliability: presently operational on over 2500 tanks.

MATERIALS

A. 5" x 5/8 " CONTINUOUS TIP
1. Will exceed 300,000 feet of roof travel.
2. Specifically formulated to provide exceptional service life.
3. Tensile strength: 2700 P.S.I.
4. Shore hardness: 70.

B. COMPRESSION PLATE
1. Available in galvanised or stainless steel.
2. Applies positive pressure about the seal.
3. Active sealing device.

C. COMPRESSION CHANNEL

D. PLATE GASKETING
1. Closed cell material, inert.
2. Provides "leak tight" joint between plates.
3. Special cases may warrant a flexible vapour seal for corrosion protection. This alternative is available.

E. GROUND SHUNT
1. Stainless Steel.
2. Positive application to shell.
3. Grounded above secondary seal wiper.

ADVANTAGES

1. Installation requires no "hot work" and can be done while a tank is in service.
2. Positive compression to the shell will:
A. Help remove wax build-up and keep tank wall clean.
B. Provide the capability to seal irregular and out-of-round tank shells.
3. Reduction of vaporitive losses means:
a) Fewer odour problems.
b) Cost effective compliance to air quality standards.
4. Documented long term maintenance free operations.
5. Easy access for visual inspection.
6. Can be used in virtually all service conditions including 100% Aromatic service.

Nayflex Seal MN32

Duo-tip Seal

MATERIALS

A. DUO-TIP CONTINUOUS TIP
1. Will exceed 300,000 feet of roof travel.
2. Specially formulated to provide exceptional service life.
3. Tensile strength: 2700 p.s.i.
4. Shore hardness: 70.

B. COMPRESSION PLATE
1. Available in galvanised or stainless steel.
2. Applies positive pressure about the seal.
3. Active sealing device.

C. COMPRESSION CHANNEL

D. PLATE GASKETING
1. Closed cell material, inert.
2. Provides "leak tight" joint between plates.

E. GROUND SHUNT
1. Stainless Steel
2. Positive application to shell.
3. Grounded above secondary seal wiper.

ADVANTAGES

1. Installation requires no "hot work" and can be done while a tank is in service.
2. Positive compression to the shell will:
A. Help remove wax build-up and keep tank wall clean.
B. Provide the capability to seal irregular and out-of-round tank shells.
3. Reduction of vaporitive losses means:
(A) Fewer odour problems
(B) Cost effective compliance to air quality standards.
4. Documented long term maintenance free operations.
5. Easy access for visual inspection.
6. Can be used in virtually all service conditions including 100% Aromatic service.

Nayflex Seal MN34

Secondary Seal for Riveted Open Top Tanks

Universal application for both riveted, bolted and welded storage tanks as a primary or secondary seal.
Proven reliability.
Approved emission control device for riveted open top floating roof tanks.

MATERIALS

A. COMPRESSION PLATE
1. Galvanised steel
2. Stainless Steel

B. SEAL PROFILER AND GROUND SHUNT (STAINLESS STEEL)

C. EXTRUDED WIPER
1. Highly abrasion resistant
2. Tensile strength – 2700 p.s.i.
3. Specially formulated to resist surface cracking induced by ultra violet exposure.
4. 100% Aromatic resistant

D. Closed cell gasketing at each lap join insures a positive seal between compression plates.

E. Galvanised channels provide rigidity for positive seal compression.

APPLICATIONS

1. Primary or secondary seal on riveted tanks.
2. Primary or secondary seal on bolted tanks.
3. Primary or secondary seal on lap welded tanks.
4. Primary or secondary seal on welded tanks.
5. Primary seal on welded tanks.

ADVANTAGES

1. Installation requires no "hot work" and can be done while a tank is in service.
2. Positive compression to the shell will:
(A) Remove wax build-up and keep tank wall clean.
(B) Provides the capability to seal irregular and out-of-round tank shells.
3. Virtual elimination of vaporitive losses means:
(A) No odour problems.
(B) Cost effective compliance to air quality standards.
4. Documented long term maintenance free operations.
5. Easy access for visual inspection.
6. Can be used in virtually all service conditions including 100% Aromatic service.

Nayflex Secondary Seals

TANK ACCESSORY PRODUCTS
Optional foam dam and foam ports for secondary seals.