Enhance system safety by preventing uncontrolled release of system media if downstream line ruptures with excess flow valves.

Design Features The O-Series contains hardened stainless steel seat and disc with a guided stem for extended service life. An internal strainer protects against dirt and scale. A phosphor Bronze diaphragm (Model Code B) specifically designed for steam service is a preferred choice over a stainless steel diaphragm which are prone to work hardening. Phosphor Bronze diaphragms are for steam use only and may fracture if used on liquid service. Viton diaphragms (Model code V) are specifically designed for water, air, or other liquid service and have a working temperature range up to 300ºF.

Rugged, all-stainless steel construction; Reverse flow coefficient less than 0.1 % of forward flow coefficient; No springs or elastomers; Compact size

Pressure Adjustment Range When selecting any regulator the proper control spring must be selected so the valve may be properly adjusted to the desired outlet pressure. Our smallest size O-Valves (3/8”- 3/4“ size) have four distinct overlapping pressure ranges. The larger size O-valves, which include the 3/4 -HC thru the 2” bodies have four distinct pressure range when using the SINGLE spring option and two wider pressure ranges when using the DOUBLE spring option. The double spring option gives the user added flflexibility in downstream pressure adjustment depending on the application.

Stop uncontrolled release of system media if downstream line ruptures. Features: Pressures up to 6000 psig (413 bar); Temperatures up to 400°F (204°C); 1/8 to 1/2 in. and 6 to 12 mm end connections; Stainless steel construction

Example: Application: 200 lbs/hr of 100 PSIG Steam reduced to 30 PSIG Model Code: O-12-N-14-B (1/2” O-Series, 10-50 PSIG spring range, NPT with Bronze Diaphragm for Steam)

Swagelok inline check valves come in a range of adjustable and fixed cracking pressures to control back flow in general-service and high-purity applications. Excess flow valves stop the release of excess flow downstream, enhancing system integrity and safety.

How To Size for O-Series From the Capacity chart, find the inlet pressure and required regulator outlet pressure. Follow across chart to nearest capacity (steam, air, water) that meets or slightly exceeds demand requirements. Follow vertically up to determine appropriate size. When exact application values are not shown, interpolate between values. Select a model with the spring range that accommodates the required outlet set pressure.

O-Series Regulator The O-Series direct-operated pressure regulators with heavy duty cast iron bodies and internal strainer are suitable for a wide range of applications in the low-to-moderate flow range. Applications include small heaters, humidifiers, various hospital equipment, tire molds, as well as many other general uses.

Swagelok® offers medium- and high-pressure fittings, tubing, valves, and related accessories with temperatures up 1000°F (537°C), pressure ratings up to 60 000 psig (4134 bar) in sizes ranging from 1/4 to to 1 in. for medium-pressure products and 1/4 to 9/16 in. for high-pressure products. NACE® MR0175/ISO15156 compliance is available.

Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.

XS series excess flow valves have a slotted poppet which moves to the tripped position when excess flow occurs downstream, then resets when pressure equalizes. They eliminate the need for a complex bypass mechanism while reducing maintenance time.

Browse stainless steel and brass poppet check valves, available with a variety of end connections and adjustable or fixed cracking pressures.

Controlling Pressure The O-Series valve reduces downstream pressure of steam, water, or gas. Downstream pressure is set by turning an adjustment screw that increases or decreases spring force above a diaphragm. The downstream pressure applies an upward force to the diaphram to compress the adjustment spring. When the system pressure equals the set point, the diaphragm moves upward against the adjustment spring force, closing the valve.

Features: All-welded design provides reliable containment of system fluid; Forward flow starts at less than 2 psig (0.14 bar) pressure differential; Valve closes with less than 2 psig (0.14 bar) back pressure; 316L SS body offers enhanced material purity

Our ultrahigh-purity fluoropolymer check valves meet SEMI Standard F57-0301 and provide low cracking pressure while maximizing flow and reducing pressure drop.

The all-welded design of high-purity welded check valves provides reliable containment of system fluid while the 316L SS body offers enhanced material purity.

Read what two Swagelok specialists have to say about how a robust tagging system for hoses and valves throughout your industrial fluid systems can help you simplify maintenance and minimize system downtime.

Steam: The O Series, with Cast Iron body and Hardened Stainless internals, is our most popular and economical solution for reducing pressure in systems.

Check valves are designed to allow fluids to flow in one direction only and are rated for use in medium- and high-pressure applications. The variety of designs available include spring, poppet, lift, and all-welded high-purity check valves for use in a range of situations.

Learn how Swagelok Shanghai has helped Shenyang Blower Works Group Corporation achieve consistency, reliability, and cost savings for its customers while improving its own safety and production efficiency.

Features: Alloy 625, alloy 825, and Alloy 2507 super duplex stainless steel materials; Available for CH4 adn Ch8 series check valves; Working pressures up to 6 000 psig (413 bar); 1/4 to 1/2 in. Swagelok tube fitting or NPT end connections; Fixed cracking pressures: 1 to 25 psi (0.07 to 1.8 bar)

Features: Working pressures up to 6000 psig (413 bar); Adjustable and fixed cracking pressures; Variety of end connections; 316 stainless steel and brass materials

Learn how to apply the practical STAMPED method to select the valves most suited to your industrial fluid or sampling system design applications.

Fugitive emissions are a growing concern in the chemical and petroleum refining industry. Certified low-emissions (Low-E) valves can protect your facility and bottom line. Learn what they are, how they are tested, and how they can help you in this post.

Browse deflector caps and a variety of poppet check valve maintenance accessories—including spring, seal and poppet replacement kits.

Other Considerations The limitation of the direct-operated type regulator is a variation of up to 10% of initial set pressure depending on changes in flow through the valve. As flow requirements through the valve increase, the outlet set pressure will tend to decrease. For example; Inlet pressure is 100 PSIG and downstream pressure is adjusted to maintain 50 PSIG while 250 lbs/hr of steam flows through the valve. If the steam flow rate happens to increase to 500 lbs/hr, then the outlet pressure would drop to 45 PSIG.

Features: Modified PTFE wetted components meet SEMI Standard F57-0301 for ultrahigh-purity system components; Fine thread flare and Nippon Pillar® Super 300 end connections; Low cracking and reseal pressure

Rugged, all-stainless steel lift check valves limit reverse flow under pressures up to 6000 psig (413 bar) and temperatures up to 900°F (482°C).