94020 Conservation Vent (Pressure-Vacuum)
High efficiency, maximum flow capacity, and minimum leakage. Easily serviceable configuration and light weight construction reduces maintenance and installation costs.
- Available with Expanda-Seal™ Option
- Suitable materials available for corrosive and extreme temperature service
- Pallet reaction lip for smooth lift and reseating
- Vertical lift pallets assure reliable operation and maximum flow
- Floating diaphragm results in a positive seal and minimal blow-down
- Capacity certified to API Standards
- Optional Insulation Jackets Available
The Shand & Jurs Model 94020 Conservation Vent is designed utilizing over 90 years of experience in producing high quality and dependable conservation fittings. Continued design improvements provide these vents with high efficiency, maximum flow capacity, and minimum leakage. The easily serviceable configuration and light weight construction reduces maintenance and installation costs.
Standard materials of construction are low copper aluminum, cast iron, ductile iron, cast steel and 316 stainless steel for body materials. Aluminum, stainless steel and steel body vents come standard with integral seats and have optional replaceable seats. Cast iron and ductile iron bodies come with replaceable seats as standard design. Replaceable seats are made of corrosion resistant molded thermosetting phenolic, Teflon, aluminum, 316 stainless steel or stainless steel Teflon coated and are easily replaced. Shand & Jurs Expanda-Seal™ option is available on all pressure pallet assemblies. This feature, shown in blue, significantly reduces leakage. The ballooning effect of the Teflon diaphragm effectively seals the valve. The Expanda-Seal™ feature ensures less than .5 SCFH of leakage at 95% of the set point.
Diaphragms are air cushion seated and are constructed of FEP Teflon for reliability and extended service life. Teflon diaphragms contribute to high resistance to adhesion of ice and gum formations, thus assuring protection against pallet sticking to the seating surface. The body is self-draining and drip rings keep condensates from the seating surfaces. The carefully engineered body, seat, and pallet assembly results in a superior combination of tight sealing and high capacity at low over-pressure with minimal blowdown.
Conservation Vents are available in a full range of sizes and configurations, such as closed vent hoods (pipe-away), cryogenic hoods and flame snuffers. Standard pressure and vacuum settings are ½ oz./sq. in. The Shand & Jurs Model 94020 Conservation Vent is available with optional pressure and vacuum limit switches and visual indicators.
Optional ‘All Weather’ Feature:
For all weather option, add the following ‘All Weather’ feature shall be provided to protect the value in temperatures ranging from -25°F to +200°F. All Weather feature shall include special anti-freeze coating applied to seat ring tip, pallet periphery and stem, and guide posts.