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Bleed Valve

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Bleed Valves

Bleed Valve By SuperlokUSA®

SuperlokUSA® bleed valves also known as drain valves—are designed for safe, controlled pressure relief in fluid and gas systems where trapped air, residual process media, or condensate needs to be vented without disrupting operations. These compact but robust valves are essential for ensuring safe shutdowns, efficient maintenance, and protecting critical components in pressurized environments.
Each bleed valve is machined from 316 stainless steel and built to perform in aggressive environments, offering excellent chemical resistance, corrosion protection, and long-term durability. The design includes a crimped safety cap to prevent unintentional disassembly during use and a precision-drilled vent hole that allows for slow, steady pressure release minimizing system shock or accidental discharge. These valves are frequently used in hydraulic, pneumatic, and instrumentation applications, particularly where pressure needs to be relieved during calibration, shutdown, or servicing.
Request a quote today or call (805) 658-2043 for high-quality Superlok bleed valves built for real-world reliability.
Superlok bleed valves are available with multiple end connection styles including NPT, ISO threads, and direct compatibility with Superlok tube fittings making them easy to integrate into both legacy and new-build systems. Their compact form factor also makes them ideal for tight installs or high-density panel layouts.
If your system demands safe depressurization, reliable venting, and fast installation, Superlok bleed valves are the kind of component that keeps things clean, controlled, and running smooth.
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Types of Superlok Bleed Valves

bleed valve

SBLV Bleed Valves

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Bleed Valves Pressure Ratings

Material316 SS
Temperature ( )Working Pressure, psig (bar)
65(-53) to 100(37)10,000(689)
200(93)9,290(640)
300(148)8,390(578)
400(204)7,705(530)
450(232)7,435(512)
500(260)7,165(493)
600(315)6,770(466)
650(343)6,660(458)
700(371)6,840(446)
750(398)6,335(436)
800(426)6,230(429)
850(454)6,085(419)

Swagelok® bleed valves by Superlok

Swagelok® bleed valves are widely used in fluid and gas systems but Superlok offers a dependable, cost-effective alternative that doesn’t compromise on performance. Designed for controlled pressure relief, Superlok bleed valves match Swagelok® spec for spec while offering faster availability and better value for teams managing demanding systems.

Built from 316 stainless steel, Superlok bleed valves are engineered for leak-tight venting of gas or liquid from pressurized lines. The crimped cap prevents accidental disassembly, while the internal vent path provides steady, safe discharge ideal for high-pressure setups or sensitive applications like instrumentation, analyzer panels, and pneumatic control systems.

With precision threads and compatibility across NPT, ISO, and Superlok tube fittings, these valves are drop-in ready for both new installs and existing Swagelok® layouts. Whether you’re maintaining a chemical line, calibrating a gauge system, or bleeding residual pressure before service, Superlok valves offer reliable shutoff, corrosion resistance, and ease of use. For purchasing teams and system designers seeking a trusted alternative, SuperlokUSA provides high-quality bleed valves that meet the same functional standards as Swagelok® with the added benefit of fast fulfillment and a more competitive price point.

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Superlok bleed valves are designed to meet the same dimensional specs and operating performance as Swagelok® and Parker® equivalents making them fully interchangeable across most instrumentation and process systems. Comparable form, fit, and function.

Each Superlok valve is machined in accordance with ASME B16.34 for pressure-rated components, and threaded connections follow ASME B1.20.1 standards to ensure reliable make-up and consistent sealing no guesswork required.

Thread tolerances and vent hole placement are precision-controlled for smooth operation and leak-free performance. Superlok bleed valves are a direct cross for Swagelok® models, backed by third-party verification and our own interchangeability and burst-test certifications available upon request.

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Installation & Maintenance Best Practices

Superlok bleed components prioritize vent port orientation during assembly to enable safe pressure relief in instrument manifolds. Chamfer bleed outlets to 30° for smooth flow, ensuring 316 stainless steel stems achieve random roughness average (Ra) under 12 micro-inches for leak-free venting. Locate valves at high points for gas bleed, using bracket kits for alignment within 0.002 inches to avoid trapping liquids.
  • Assemble via NPT threads hand-tight then torque to 15 ft-lbs on 1/8-inch vents to 75 ft-lbs on 1/4-inch with open-end wrenches, verifying seal compression in pressure systems without thread galling.
  • For high-purity fluid processors, integrate with block valves for double isolation, adding purge tees for clean-in-place (CIP) helium flushes at 250°F that evacuate residuals below 5 ppm without stem exposure.
  • Fasten with hose clamps spaced 4 inches to resist vibration, conducting leak testing at 1.5 times maximum allowable working pressure (MAWP) for 8 minutes with soap solution to spot micro-weeps.
Vent to atmosphere thrice post-install to clear lines, recording bleed times under 30 seconds. In sanitary stainless steel, choose needle-style bleeds for CIP acid rinses, confirming no metal ions via ICP-MS under 0.5 ppb. Semiannual evaluations use electronic leak detectors for emissions below 10^-6 scc/sec, scoping 316 stainless steel vents for pitting over 0.0015 inches.
  • Overhaul annually in fume hoods for stem repacking with PTFE tape and vent polishing with wire brushes, followed by vapor degreasing at 100°F and citric passivation to enhance oxide barriers in corrosion-resistant alloys.
  • Re-test post-300°F service, logging vent rates with mass flow controllers for precise fluid control verification.
  • Track bleed events and pressure logs in digital twins, linking to manifold volumes for optimized relief sizing in control panels.
  • Hazardous locations fit flame arrestors downstream, ensuring bleed flow caps at 10 scfm to comply with ISA S12.1 standards in gas sampling stations.
These practices fortify bleed reliability to 60,000 vents, accelerating isolations in oil analyzers and pharma isolators. Data logging cuts response times by 28%. Vent positioning and testing ensure effective relief across sectors. (Word count: 250)
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Quality & Standards Compliance

Superlok bleed components derive from 316 stainless steel forgings per ASTM A182/A479, exhibiting tensile over 70 ksi and impact toughness above 45 ft-lbs at -20°F for vent durability under rapid depressurization. Forgings undergo positive material identification (PMI) via handheld spectrometers, affirming molybdenum content over 2.5% for pitting resistance equivalent numbers (PREN) above 25 in acidic vents.
  • Vent port threading follows ASME B1.20.1 class 2B with ±0.0005-inch pitch, checked by thread rings and CMMs for seamless makeup that prevents weepage at rated pressures.
  • Stem actuation testing at 1.5 times rated working pressure (RWP) per MSS SP-117 employs air for shutoff below 10^-7 scc/sec, enduring 40,000 cycles without packing extrusion.
  • Seal compression per API 598 class IV verified with FEA for stem loads at 1,200 psi, optimizing gland designs for minimal torque under 15 ft-lbs.
Surface passivation attains Ra 18 micro-inches, substantiated by 450-hour salt spray per ASTM B117 without degradation on 316 stainless steel in brackish exposures. Production in ISO 14644 Class 8 facilities constrains particulates to 800 per cubic meter, supporting high purity fluid processors.
  • Interchangeability with Swagelok®, Parker®, and Hy-Lok® through SGS bleed rate trials maintains 800 psig without bypass, per equivalence certifications.
  • Proof pressures exceed 4 times RWP, documented in mill test reports (MTRs) with liquid penetrant NDT for cracks under 0.0003 inches, compliant with ASME B31.3.
  • Thermal shock per ASTM E2208 from -40°F to 350°F confirms no seal pop, while ignition testing per ASTM G93 validates oxygen safety.
  • SGS audits deliver vent profiling and radiographic NDT for voids below 0.0007 inches, furnishing certificates of compliance (CoCs) under ISO 9001:2015.
This layered validation crafts components for 22-year venting in hydraulic test stands and biotech hoods, exceeding norms for isolation in pressure systems. Traceability streamlines NFPA audits from manifolds to vents. Stem precision enables quick, safe depressurization. (Word count: 250)
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Frequently Asked Questions

What materials are Superlok bleed components constructed from?
Superlok bleed components feature 316 stainless steel construction for inherent corrosion resistance in high purity sanitary stainless steel environments, meeting ASTM A182/A479 specifications with controlled carbon levels under 0.03% to prevent sensitization during exposure to harsh media. Brass variants suit low-pressure water lines for cost-effective venting, while Alloy 625 options handle extreme sour service in petrochemical applications with enhanced pitting resistance exceeding PREN 40.
Superlok male connectors rate to 10,000 psig at ambient temperatures for 1/2-inch sizes, derating to 5,000 psig at 500°F per ASME B31.1 derating factors for reliable bleed-off under thermal cycling. Female adapters hold 6,000 psig cold non-shock, with unions at 9,000 psig, providing burst safety margins above 4:1 to manage pressure relief in dynamic process headers.
Superlok bleed components align dimensionally with Swagelok®, Parker®, and Hy-Lok® standards, including NPT per ASME B1.20.1 and compression ferrules with identical bite angles for seamless interchanges. This enables drop-in replacement in legacy tubing runs without flow impedance, maintaining Cv values over 0.25 and minimizing turbulence in multi-vendor gas sampling lines.
Identify nominal pipe size (NPS) by measuring outside diameter and schedule thickness, then cross-reference Superlok catalogs for matching end connections to ensure precise bleed port sizing. For high purity fluid processors, select reduced bore designs to cut turbulence below Reynolds number 2,000, optimizing depressurization rates to under 10 scfm for safe venting in cleanroom protocols.
In-stock fittings ship same-day from U.S. facilities, supporting immediate access to standard NPT bleed valves for urgent field deployments. Custom angles or weld ends in exotic alloys require 4-6 weeks fabrication, with express machining slashing to 7-10 days to accelerate integrations in time-critical semiconductor toolsets.
Yes, electropolished variants deliver Ra 10 micro-inch interiors, certified particle-free per ISO 14644 Class 5 for semiconductor etchants and dopant handling. They integrate seamlessly with clean-in-place instrumentation, enduring 200+ CIP cycles without chromium depletion or residue generation above 5 ppb TOC.
Preserve in climate-controlled areas at 40-80°F with humidity below 50%, segregated from carbon steels to forestall rust contamination during prolonged storage. Employ polyethylene bags with silica gel desiccants for multi-year holds, inspecting for surface films prior to deployment to uphold corrosion-resistant integrity in sensitive manifolds.
For 1/4-inch NPT, apply 22 ft-lbs initial torque, followed by snug verification after pressurization to confirm zero leaks at 1.5x operating pressure. Larger 1-inch threads demand 80 ft-lbs maximum using calibrated click-type tools to evade stripping, ensuring vibration-proof seating in sanitary assemblies per SEMI F1 guidelines. For 1/4-inch NPT, apply 25 ft-lbs initial then verify snug after proofing to prevent leaks at operating pressure. Larger 1-inch sizes cap at 90 ft-lbs with calibrated tools, reducing 15% for soft-seated variants to avoid distortion in sanitary setups.
Superlok fittings perform to -320°F with Charpy impact values over 50 ft-lbs, suitable for liquid nitrogen lines and subzero bleed applications. Low-temperature embrittlement testing per ASTM E23 confirms fracture toughness, with pressure derates applied below -100°F for safe operation in cryogenic pressure systems without valve freeze-up.

Industry Leaders Using Superlok

Bleed valves are essential in industries that demand safe, controlled pressure relief and routine venting without full system shutdown. You’ll find them in oil and gas, chemical processing, pharmaceutical manufacturing, food and beverage, and semiconductor systems anywhere system integrity and safety depend on clean, reliable depressurization.

Superlok bleed valves are built to handle the everyday pressures of these environments literally. Made from 316 stainless steel and engineered with precise vent hole control, they offer strong chemical resistance and a leak-free seal, even after repeated cycling. Their compact size and easy installation make them ideal for tight setups, dense control panels, and remote field installs.

Whether you’re purging trapped air from a hydraulic loop, bleeding off line pressure in a gas system, or venting residual fluid from instrumentation tubing, Superlok valves provide reliable performance in systems that can’t afford mishandled discharge. From pressure-sensitive clean-in-place systems to rugged industrial service lines, Superlok bleed valves are trusted by operators, engineers, and maintenance teams across sectors where precision, safety, and uptime are non-negotiable.

Superlok Advantage

LARGEST INVENTORY OF BLEED VALVES READY TO SHIP

SuperlokUSA maintains a consistently stocked inventory of bleed valves available in all major configurations, pressure ratings, and end connections. Whether you're specifying a fluid analyzer, field panel, or pressure loop, we have what you need on the shelf and ready to go. Our inventory includes 316 stainless steel bleed valves with NPT, ISO, and tube fitting-compatible ends making them plug-and-play replacements for Swagelok® and other OEM systems. We eliminate long lead times and distributor delays by keeping our warehouse stocked and shipping direct.
While legacy brands often rely on fragmented supply chains and regional availability, Superlok centralizes inventory and speeds up sourcing giving engineers and buyers fast access to the components they need, exactly when they need them.

FAST DELIVERY ACROSS THE U.S. NO WAITING, NO GUESSWORK

SuperlokUSA’s shipping process is streamlined for speed. We process and ship most bleed valve orders same-day or next-day, with full tracking, real-time order updates, and delivery options that work around your project timeline not against it.
Our fulfillment team partners with major carriers to offer pre-negotiated rates and rapid service, even on high-quantity or repeat orders. Whether you're sourcing a handful of valves for emergency repair or restocking a full MRO shelf, we’ve got logistics dialed in to get parts in your hands fast. Compared to Swagelok®, where delivery often depends on rep availability or regional distribution, Superlok cuts out the middlemen. Fewer steps. Faster turnaround. Zero excuses.

Request A Quote
Call Us (805) 658-2043
Request A Quote
Call Us (805) 658-2043