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Pressure Relief Valves

Tank Protection

Conservation Vents

Product Brand Pressure Temp. Size
2010B and 2020B Weight Loaded Pressure and Vacuum Relief Valves Varec 0.21 oz/in2 to 2 psig (pressure)
0.21 oz/in2 to 2 psig (vacuum)		 -65 to 350 F 2 to 12 inch
2440 and 2450 Series Spring Loaded Pressure and Vacuum Relief Valves Varec 1 to 50 psig (pressure)
0.7 to 14 oz/in2 (vacuum)		 NA 2 to 12 inch
3500B, 3600B and 3650B Series Weight Loaded Vacuum or Pressure Relief Valves Varec 0.21 oz/in2 to 2 psig (pressure)
0.21 oz/in2 to 2 psig (vacuum)		 -65 to 350 F 2 to 12 inch
4110A, 3610 and 3660 Series Spring Loaded Vacuum Relief Valves Varec 1 psig to 50 psig (vacuum) NA 2 to 12 inch
7000 Series Mushroom (Free) Vents Varec 1 psig NA 2 to 12 inch
7100B Series Weight Loaded Pressure Relief Vent Varec 0.23 oz/in2 to 2 psig -65 to 350 F 2 to 12 inch
711 Series Spring Loaded Pressure Relief Vent Varec .5 to 50 psig -65 to 350 F 2 to 12 inch

Emergency Vents

Product Brand Pressure Temp. Size
221 Series Emergency Pressure Relief Manway Covers Varec 0.5 to 6 oz/in2 (pressure)
0.5 to 1 oz/in2 (vacuum)		 NA 18, 20, 24 inch
4210A Series Emergency Pressure Vent and Manway Covers Varec 2" wc to 2 psig NA 18, 20, 24 inch

Flame Arresters

Product Brand Pressure Temp. Size
5000 and 5010 Series Flame Arresters Varec 10 psig max.
1 psig max. pressure drop		 -40 to 176 F 2 to 12 inch
5400A Series Flame Arrester Varec 10 psig max.
1 psig max. pressure drop		 -40 to 176 F 2 to 12 inch
5810B and 5820B Series Relief Valve with Flame Arrester Varec 0.21 oz/in2 to 2 psig (pressure)
0.21 oz/in2 to 2 psig (vacuum)		 -25 to 176 F 2 to 12 inch
5910B and 5920B Series Relief Valve With Flame Arrester Varec
0.21 oz/in2 to 2 psig (pressure)
0.21 oz/in2 to 2 psig (vacuum)		 -25 to 176 F 2 to 12 inch

Low Pressure Pilot Operated Relief Valves

Product Brand Pressure Temp. Size
Series 90 Low Pressure Pilot Operated Pressure Relief Valves Anderson Greenwood 3" wc to 150 psig -423 to 400 F 2 to 12 inch
Type 9200 Low Pressure Pilot Operated Pressure Relief Vents Anderson Greenwood 4” wc to 5 psig (pressure)
-1.73” wc to -5 psig (vacuum)		 -320 to 200 F 2 to 12 inch
Type 9300 Low Pressure Pilot Operated Pressure Relief Vents Anderson Greenwood 4" wc to 50 psig (pressure) -320 to 200 F 2" x 3" to 12" x 16"
Type 96A Weight Loaded Vacuum Breaker Anderson Greenwood 0.5 oz/in2
1.5 oz/in2 (vacuum)		 -320 to 300 F 4 to 12 inch

Specialty Tank Equipment

Product Brand Pressure Temp. Size
Internal Tank Valves (ITV) Liquid Storage: LNG, LPG, NH3, LOX Anderson Greenwood NA NA 4 to 30 inch
Reserve Capacity Relief Valve (RCRV) Low Temperature Storage Anderson Greenwood 1.5 to 5 psig NA 24 and 36 inch

Tank Accessories

Product Brand Pressure Temp. Size
220 Series Roof Manway Cover Varec Up to 1 psig NA 18 to 36 inch
42 Series Sampling and Gauging Hatch Covers Varec Up to 3 psig NA 4, 6, 8, 10 inch
4310 Series Sampling and Gauging Hatch Covers Varec Up to 3 psig NA 4 and 8 inch

Tank Blanketing Valves

Product Brand Pressure Temp. Size
Trans Zero Blanketing Valves (RA, Y1, BV-1) Anderson Greenwood 0.5 in. wc to 6 psig (set)
200 psig max. (inlet)		 -20 to 300 F .5 to 2 inch
180 Series Double Port Pressure Regulators Varec -0.4" wc to 20" wc (set)
20 psig max. (inlet)		 NA 1 to 8 inch