Safety Spray Shields by APS



Safety Spray Shields are used to prevent injury to personnel or damage to equipment in the event of a leak or spray-out of acids, caustics, chlorine, and other dangerous liquids at piping connections (such as flanges, valves, or expansion joints) found in chemical, pulp/paper, petrochemical and wastewater treatment plants. These Safety Shields are commonly referred to as flange guards, flange covers, flange diapers, or flange protectors. Our Safety Spray Shields are constructed from PTFE, polypropylene, PVC, polyethylene, and stainless steel. 


Our plastic cloth shields are manufactured from single and multilayered clear cloth for easy visibility or a colored cloth with a leak indicating patch. Weep holes located behind the sensitive pH indicating patch allow the indicator to immediately signal a leak and change color to red in the presence of an acid or green if an alkali. The pH patch is also replaceable which allows the shield to be reused. APS shields are UV stabilized and resistant to sun, rain, and fumes. They may be used indoors or outdoors. Our cloth shields are quickly and easily installed by one person without any tools by means of a Velcro fastener and drawstrings which are standard.

  • Cloth shields are available in five different materials and eight various styles.
  • Can be customized for any and all special requirements or applications.
  • Available for all standard 150# and 300# flanges.


  • PTFE coated glass cloth.
  • PTFE thread and drawstring.
  • Maximum operating temperature 450°F.
  • Fire and tear resistant.
  • Styles available are standard, single-ply, premium, clear PTFE, and PTFE supershield.
  • Standard color is brown.
  • Broad Spectrum of chemical resistance.


  • Our most popular and best selling shield.
  • 3-ply multilayered reinforced construction.
  • Laboratory test proven.

Single ply

  • Similar in design to standard PTFE shield.
  • Same quality construction except single-layered for less severe applications.


  • High PTFE content for severe applications.
  • Outlasts all other brands on market.
  • 3-Ply multi-layered construction
  • Laboratory test proven

Clear PTFE

  • Similar in design to standard PTFE shields.
  • 100% clear PTFE strip in center of shield allows for visual inspection.

PTFE Super Shield

  • Solid PTFE construction (expanded PTFE cloth)
  • PTFE or Nomex cord, thread, and reinforcement
  • Suitable for applications where coated glass is not acceptable
  • Reinforced construction through multi-layered design
  • White in color

Additional Cloth Options


  • 100% black polypropylene cloth, thread, and drawstring.
  • Polypropylene stiffener lines the interior for added protection.
  • Maximum operating temperature 200°F.

Polyvinyl Chloride (PVC)

  • Manufactured from yellow, reinforced polyvinyl chloride.
  • Reinforced thread and drawstring.
  • Maximum operating temperature 170°F.


  • Manufactured from transparent, reinforced Polyethylene.
  • Reinforced thread and drawstring.
  • Maximum operating temperature 170°F.


  • Available in same cloth and metal materials as other shields.
  • Manufactured to fit all types of valves:
    - Butterfly, Globe, Check, Diaphragm, Gate, Ball, Plug.


  • Manufactured from single, clear, and standard PTFE only.
  • Same quality design as other cloth shields.
  • pH indicating patch to signal leaks.
  • Weep holes behind patch allow indicator to change color.
  • Attached by Velcro fasteners and drawstrings.
  • Allows for movement of the expansion joint without any change in effectiveness.
  • Available for all brands and styles of expansion joints.

"Recommended by most manufactures of PTFE lined expansion joints."


  • Designed to cover pipe vent outlets on safety relief valves and rupture discs.
  • Manufactured from heavy duty polyvinyl chloride (PVC).
  • Weatherproof: prevents rainwater and snow from entering pipe.
  • Keeps out birds and insects.
  • UV stabilized and chemical resistant.
  • Easy to install.
  • Contains drawstring for securing.
  • Contains grommet with rope attached to prevent loss.
  • Available for all pipe sizes.
  • Available in angle or straight cut.