Liquid Relief Valve Model 69

Series 69 is an industry standard relief valve used for liquid relief and by-pass. Engineered and designed for heavy duty, industrial and commercial usages. A single piece bonnet to eliminate leakage while allowing for simple cleaning. Easy removable sealed hex-cap to adjust pressure.

Series 69 relief valves are calibrated (set to pressure) based on a range of flow-rates (GPM) versus seat size and set pressure. Standard valve is set to pressure to achieve flow rate maximum and minimums within each set pressure range. See capacity chart for details. New (WR) wide range adjustable and available in 150 PSI increments.

Model Choices:
69A – Brass/bronze valve with stainless steel springs
69B – Brass/bronze valve with stainless steel seating inserts, disk and springs
69C – Stainless steel body / disk with bronze bonnet, stainless steel springs

Wide Range:
Series 69 is now available with a wider adjustable range (as an option). Valves are set to the mid-level pressure (or as specified). Typical wide-range is 150 PSI increments. Note: Flow rates are not showing on flow charts and vary by set pressure points.

Include liquid by-pass, regulation, continuous relief and overprotection. Used on pumping stations, tanks, hydraulics, fluid / piping lines, oil fields, gas lines and more.
Field adjustable by simple removal of the hex-cap
Metal to metal precision lapped seating
Back pressure tested at factory
Ease of cleaning and maintenance with simple removal
Stainless steel springs
Single piece leak free bonnet
O-ring seating options (see charts)
Packed lift lever
BSPT connections
Low lead option
Viton embedded o-ring at hex cap
Wide range WR adjustable (150 PSI increments)
Stainless steel body, disk, and seating
Adjustable wheel handle
Female Inlet

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High Capacity Safety Valve Model 560

Our 560/570 valve line is a high capacity safety valve used for boilers, piping lines and vessel protection. Designed and engineered for heavy-duty industrial use. ASME approved and National Board flow-rated for capacity.

Steam Boilers, Air Compressors, Dryers, Receivers, Pressure Vessels, Piping Systems, Accumulators, Reducing Stations, Tanks, Inter/After Coolers, Cooking Equipment, Autoclaves, Sterilizers or wherever higher capacity pressure protection or relief may be required.
Designed for durability
6 orifices – 12 sizes of piping options
Top guided seating and discharge
Full nozzle; high capacity levels
Excellent re-seating characteristics with ball-post pivoting design
Short, tuned blow-down with dual-ring technology
Heavy duty hood and lever mechanism
Standard 17-7 stainless steel springs
O-ring seating options (see charts)
Packed lift lever
Stainless steel trimming package nozzle (body), disk (all sizes)
O-ring seating. (PTFE, EDPM, Viton, or as specified)
Bubble tight seating options
Anti vibrating spring for lift lever
BSPT pipe threading

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Series 740 Safety and Relief Valve

Aquatrol's new Series 740 safety and relief valve is designed for accuracy and reliability. Engineered for heavy-duty industrial usage. Multiple purpose safety and relief valve for all services: Liquid, Steam and Air/Gas. ASME and National Board Certified for Section VIII service. Pressures are to 750 PSI. Available with the full array of metal and seating options.

Pressure Vessels, Pumps, Hydraulics, Tanks, Steam Systems, Chemical, Cryogenic, Air and Gas Compressors, Separators, by-pass and over pressure protection. Choose for most industrial applications requiring a safety relief valve.
Full nozzle – top guided design
Short, precise blow-down
Wide choice of inlet/outlet sizes
Excellent reseating characteristics
Designed for heavy industrial use
Closed hex cap
Back pressure tight
Drainhole with threaded plug
Cryogenic Compatible
O-ring seating options
Packed lift lever
Open lift lever
BSPT piping
Full array of metal options
O2 Cleaning

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