Sanitary Fitting Guide

1. Clamp Size is determined by the outside diameter of the tubing, NOT the outside diameter of the ferrule.
2. You can join the compatible sizes, such as the ½” and the ¾”, but remember the tubing sizes can be different and will affect flow. Consequently, use the larger size gasket.
3. Tri-clamp fitting typically has about a ½” greater diameter than the outside diameter of the tube.

For Reference Only

U.S. national technical standards for screw threads used on threaded pipes and pipe fittings.

The pipe chart shows the outside diameters and the wall thicknesses for various pipe sizes. The dimensions vary according to the schedule number. The most common is Schedule 40 and the rarest is Schedule 5. The nominal pipe size (NPS) is not determined by the outside diameter nor the inside diameter of a pipe.

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For Reference Only

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Buna (NBR or Nitrile)Tri-Clamp® Gasket

• -20°F to 250°F Temperature Range (-28°C +121°C)
  
• Handle most dairy, food and sanitary processing services.
• Poor with strong acids and ozone (except PVC blend)
• Excellent for oils and petroleum based fluids.
• Great tear resistance and is flexbible
  

EPDM (Ethylene Propylene) Tri-Clamp® Gasket

• -30°F to 300°F Temperature Range (-34°C +150°C)
• Handle most dairy, food and sanitary processing services.
• Poor with most oil-based products, petroleum-based fuel, solvents and aromatic hydrocarbons.
• Acceptable for low pressure steam applications
• Great resistance to ozone, good resistance to acids, alkalis and alcohols.
• Great tear resistance and is flexible
  

Viton (FKM or FPM) Tri-Clamp® Gasket 

• -30°F to 400°F Temperature Range (-34°C +204°C)
• Handle most dairy, food and sanitary processing services.
• Poor with ketones such as acetone, methyl ethyl ketone, ester solvents such as ethyl acetate, amines and acetic acid.
• Excellent mechanical, chemical, heat and steam resistance
• Excellent with strong acids, oils, solvents and abrasives.
• Great tear resistance and is flexible

Silicone Tri-Clamp® Gasket

• -40°F to 450°F Temperature Range (-40°C +232°C)
• Handle most dairy, food and sanitary processing services.
• Poor with oils
• Good tear resistance and is the most flexible
  

TEFLON (PTFE) Tri-Clamp® Gasket

• -100°F to 500°F Temperature Range (-73°C +260°C)
• Handle most dairy, food and sanitary processing services.
• Poor with large temperature variation and will affect density
• Excellent resistance to process fluids
• Great for most acids, alcohols, detergents and solvents.
• Rigid and has good stability

• SS304 Type 304, with its nickel-chromium content and low carbon content, is the most versatile and most used austenitic stainless steels. It contains 18% chromium, 8% nickel and 0.8% carbon. Type 304 is resistant to oxidation, corrosion and durability.
• SS316 Type 316 is an austenitic stainless steel chrome-nickel stainless steel and heat-resistant steel with superior corrosion resistance compared to other chrome-nickel steels when exposed to types of corrosive agents chemical. It contains 18% chromium and 8% nickel and 0.8% carbon and maximum 3% molybdenum. 316 contains molybdenum, it has a greater resistance to chemical attack than 304. Type 316 is more durable and easy to clean. It is much more resistant to solutions of sulfuric acid, chlorides, bromides, iodides and fatty acids at high temperature. Molybdenum are needed to manufacture certain pharmaceuticals to avoid excessive metal contamination.

For Reference Only

• Example of Boiling Water at 212 *F and 0 psig - At atmospheric pressure 0 psig, water boils at 212 *F. 180 Btu/lb of energy is required to heat 1 lb of water to saturation temperature 212 *F. Another 970 Btu/lb of energy is required to evaporate the 1 lb of water at 212 *F to steam at 212 *F.
• Standard Atmospheric Pressure - 1 atm = 1.01325 bar = 101.3 kPa = 1.013 105 Pa = 14.696 psi (lbf/in2)= 760 mmHg =10.33 mH2O = 760 torr = 29.92 inHg = 1013 mbar = 1.0332 kgf/cm2 = 33.90 ftH2O

Properties of Saturated Steam

For Reference Only