HEAVY DUTY
TORQUE WASHER

NEW IN OUR RANGE

PROBLEM Leakage due to loss preload
• Embedment relaxation
• Gasket Creep
• Bolt creep/Stress Relaxation
• Vibration
• Differential Thermal Expansion
• Elastic Interaction

SOLUTION HDTW
1 Create a more reliable assembly
• Even load distribution,
• Maintains residual gasket/bolt load
• Longer gasket life
2 Simplified Installation
• Can be used with any bolting technique
(torque wrench, tensioners, slug wrench)
• No need to hot tighten
• Lower fugitive emissions
3 Less down time
• No leaks

HEAVY DUTY TORQUE WASHERS
are used to maintain a designed bolt load or torque or bolt stress.

TECHNICAL INFORMATION

• The H-13 HDTW are designed to fit ASME/ANSI b16.5 flanges & DIN/EN flanges
• They are manufactured to match 30, 45 and 60.000 lb bolt stress
• The ID of the washer is determined by the bolt size
• The OD of the washer is determined by the area between the edge of the flanges and the hub
• The thickness is determined by the design criteria to match 30, 45 and 60.000 bolt stress
• All H-13 HDTW are totally machined

On a valve, the HDTW are used on the gland follower studs
and/or the bonnet bolts to maintain the load on the packing or gasket.
INSTALLATION

Typical installation Recommended with bolt tensioner
Additional load or movement needed