Products

Key Contacts

Understanding Tank Safety

What's New

Regulations

    PILOT OPERATED TANK BLANKETING VALVE
    Series No. 20

    Protectoseal Series No. 20, Pilot Operated Tank Blanketing Valve, is designed to regulate the flow of a blanketing gas (usually Nitrogen) into the vapor space of a flammable liquids storage tank. The valve senses the pressure in the vapor space and opens to allow a flow of gas into the tank when the pressure drops below its set point. When tank pressure returns to the valve's set point, the flow of gas is stopped.

    The Series No. 20 valve consists of a main valve (which controls the flow of inert gas into the tank), and the pilot valve (which accurately senses the tank's pressure and controls the opening and closing of the main valve). This tandem valve arrangement provides extremely accurate control of the flow of gas into the tank. The pressure balanced poppet in the pilot ensures that a consistent opening set pressure is realized over the range of allowable inert gas supply pressures. The Series No. 20, Pilot Operated Tank Blanketing Valve, requires a very small band of pressure to cycle from closed, to open and fully flowing, to resealed.

  • Designed specifically for tank blanketing

  • Pilot operated design provides very tight operating band

  • Compact, light weight design

  • 1" NPT inlet and outlet standard

  • Optional inlet and outlet connections available

  • Accommodates inlet gas pressures from 20 PSIG to 200 PSIG

  • Set points from -0.5 inches water column to 69.2 inches water column

  • Optional flow plugs to meet specific flow requirements

  • Fully field serviceable

  • Drawing / dimension chart

  • Pressure balanced poppet provides consistent opening over a full range of inlet gas pressures

  • Optional pilot and sense line gauges

  • System purge and field test capability available

  • Factory tested and certified

  • Conforms with European ATEX Directive 94/9/EC
  • Fully documented User Guide and Maintenance & Installation Instructions available upon request

    		•

    Materials of Construction

    VALVE BODY &
    COMPONENTS
    		STANDARD:
    CUSTOM:    		 316 Stainless Steel
    Others
    FITTINGS &
    HARDWARE
    		STANDARD:
    CUSTOM:    		 316 Stainless Steel
    Others
    SPRINGS
    		302 Stainless Steel
    SOFT GOODS
    		STANDARD:
    CUSTOM:     		Buna-N
    Neoprene, Viton®, EPDM,
    Chemraz®, Kalrez® & others
    DIAPHRAGM
    		FEP Film
    FILTER
    		STANDARD:
    CUSTOM:    		 Aluminum/Zinc/Polypropylene/
    Buna-N/Acetal
    Stainless Steel/Polypropylene/
    Viton®/Acetal
    Viton® is a registered trademark of DuPont Dow Elastomers.



Copyright ©1996 The Protectoseal Company
225 W. Foster Ave.
Bensenville, IL 60106
Phone: (630) 595-0800
Fax: (630) 595-8059
E-mail: info@protectoseal.com