Double Block-and-Bleed Valves | McMaster-Carr

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Double Block-and-Bleed Valves

Additional Valves

Abrasive Blasting Valves Abrasive Media Valves Access Valves Actuated Ball Valves Actuated Butterfly Valves Actuated Valves ADA-Compliant Flush Valves Adjustable Pressure Relief Valves Adjustable-Flow Valves Air Compressor Drain Valves Air Compressor Valves Air Condensate Drain Valves Air Conditioning Valves Air Control Valves Air Cylinder Control Valves Air Fill Valves Air Flow Control Valves Air Relief Valves Air Shut Off Valves Air Solenoid Control Valves Air Solenoid Valves Air Tank Valves Air Valves Air Vent Valves Air-Actuated Ball Valves Air-Driven Ball Valves Air-Driven Butterfly Valves Air-Driven Diaphragm Valves Air-Driven Piston Valves Air-Exhaust Ball Valves Air-Exhaust Valves Airlock Valves Air-Release Valves Aluminum Air-Actuated Valves American Standard Flush Valves Angle Globe Valves Angle Piston Valves Angle Valves Angle-Seat Valves ANSI Butterfly Valves ANSI Flush Valves Antiscald Shower Valves Anti-Siphon Valves ASCO® Red Hat-Compatible Solenoid Valves ASME Flush Valves ASME Pop-Safety Valves ASME Relief Valves Automatic Drain Valves Automatic Flush Valves Automatic Valves Back Stop Valves Backflow Valves Backflow-Prevention Valves Back-Pressure Relief Valves Backwater Valves Balancing Valves Ball Float Valves Ball Valves Barrel Valves Batch Control Valves Batch Dispensing Valves Bicycle Tire Valves Blast Gate Valves Bleed Ball Valves Bleed Needle Valves Bleed Valves Block-and-Bleed Valves Blocking Valves Blowgun Valves Blowoff Valves Boiler Blow-Down Valves Boiler Blowoff Gate Valves Boiler Drain Valves Boiler Gate Valves Boiler Globe Valves Boiler Pop-Safety Valves Boiler Safety Valves Boiler Valves Brass Air Conditioning Valves Brass Air-Actuated Valves Brass Pop-Safety Valves Brass Pressure Regulating Valves Brass Sleeve Valves Brass Solenoid Air Control Valves Brass Solenoid Valves Brass Temperature Regulating Valves Brass Vacuum-Breaking Valves Bronze Air-Actuated Valves Bronze Pop-Safety Valves Bronze Pressure Regulating Valves Bronze Temperature Regulating Valves Bronze Vacuum-Breaking Valves Bronze Valves Bung Valves Butterfly Valves Bypass Ball Valves Bypass Plug Valves Bypass Relief Valves Carbon Steel Ball Valves Cartridge Valves Cast Iron Pop-Safety Valves Cast Iron Relief Valves Cast Iron Valves Check Valves Clamp-Style Pinch Valves Cleaned and Bagged Ball Valves Cleaned and Bagged Globe Valves Cleaned and Bagged Valves Cock Valves Compact Valves Compressed Air Actuated Solenoid Valves Compressed Air Condensate Drain Valves Compressed Air Control Valves Compressed Air Drain Valves Compressed Air Lockout Valves Compressed Air Valves Compression Saddle Valves Compression Toggle Valves Compression Valves Compressor Drain Valves Condensate Drain Valves Control Valves Coolant Hose Valves Coolant Valves Counterbalance Valves CPVC Union Ball Valves Cylinder Control Valves Cylinder Valves Dairy Valves Deadman Ball Valves Diaphragm Valves Direct-Acting Solenoid Valves Direct-Acting Temperature-Regulating Valves Direct-Acting Valves Directional Control Solenoid Valves Directional Control Valves Directional Valves Dispensing Valves Diverting Plug Valves Diverting Valves Double-Union Ball Valves Drain Check Valves Drain Float Valves Drain Pipe Check Valves Drain Valves Drinking Fountain Valves Drip Leg Valves Drip Valves Drum Valves Dual-Check Backflow Prevention Valves Duckbill Valves Duct Valves Ductile Iron Needle Valves Ductile Iron Valves Dump Valves Dust Collector Valves Elbow Globe Valves Elbow Needle Valves Elbow Valves Electric Drain Valves Electrically-Actuated Air Directional Control Valves Electrically-Actuated Ball Valves Electrically-Actuated Butterfly Valves Electrically-Actuated Valves Electrically-Actuated Water Valves Elliptic Ball Valves Elliptic Valves Emergency Stop Valves Emergency Wash Fountain Mixing Valves Emergency Wash Mixing Valves Emergency Wash Shower Mixing Valves Emergency Wash Station Mixing Valves Exhaust Control Valves Exhaust Toggle Valves Exhaust Valves Eye Wash Station Mixing Valves Faucet Valves FDA-Listed Regulating Valves Feeder Valves Fill Valves Filter Ball Valves Fire Hose Valves Fire Safety Valves Fire-Tested Ball Valves Fire-Tested Valves Flame-Check Valves Flange-Mount Check Valves Float Valves Flow Control Valves Flow Valves Flush Valves Food Industry Valves Foot Valves Foot-Operated Air Control Valves Foot-Operated Control Valves Foot-Operated Valves Foot-Operated Water Flow Control Valves Four-Way Air Directional Control Valves Four-Way Hydraulic Directional Control Valves Frostproof Vacuum-Breaking Valves Fuel Valves Fusible Link Valves Garden Hose Shut-Off Valves Gas Mixing Valves Gas Shut-Off Fire-Safety Valves Gas Shut-Off Solenoid Valves Gate Valves Gauge Valves Globe Valves Gradual On/Off Valves Gravity Check Valves Grip-Style Valves Grit Valves Gyrolok-Compatible Ball Valves Hand Valves Hands-Free Faucet Valves High-Vacuum Valves Horizontal-Lift Check Valves Hose Bibb Valves Hose Shut-Off Valves Hose Valves Hydraulic Control Valves Hydraulic Cylinder Valves Hydraulic Needle Valves Hydraulic Pump Valves Hydraulic Valves Hydronic Valves Hydronic Zone Valves Inline Valves Instrumentation Ball Valves Instrumentation Valves Iris Valves Iron Pop-Safety Valves Irrigation Ball Valves Irrigation Solenoid Valves Irrigation Valves Isolation Valves Key-Operated Valves Knee Valves Knife Gate Valves Knife Valves Labcock Valves Laboratory Valves Lever-Arm Ball Valves Lever-Arm Butterfly Valves Lever-Arm Float Valves Lever-Arm Globe Valves Lever-Arm Plug Valves Liquid Relief Valves Liquid-Level Float Valves Liquid-Level Tank Valves Liquid-Level Valves Lockable Ball Valves Lockable Butterfly Valves Lockable Gate Valves Lockable Plug Valves Lockable Valves Lockout Control Valves Lockout Valves LOTO (Lockout/Tagout) Valves Low-Lead Check Valves LP Gas Ball Valves LP Gas Valves Lubrication Needle Valves Manifold Valves Manual Air Control Valves Manual Compressed Air Valves Manual Valves Mechanically-Operated Air Control Valves Metal Air Directional Control Valves Metal Air Tank Valves Metal Air-Actuated Valves Metal Air-Driven Ball Valves Metal Directional Control Valves Metal Hydraulic Control Valves Metal Pop-Safety Valves Metal Pressure Regulating Valves Metal Push-Button Valves Metal Sleeve Valves Metal Solenoid Air Control Valves Metal Solenoid Valves Metal Vacuum-Breaking Valves Metering Needle Valves Metering Valves Metric Ball Valves Metric Globe Valves Metric Valves Miniature Air Control Valves Miniature Air Directional Control Valves Miniature Air-Actuated Valves Miniature Ball Valves Miniature Check Valves Miniature Float Valves Miniature Mixing Valves Miniature Needle Valves Miniature Pressure Regulating Valves Miniature Relief Valves Miniature Solenoid Valves Miniature Valves Mixing Valves Mixing Valves for Shower Stations Modular Valves Moisture Drain Valves Molasses Valves Monday-Morning Valves Motor-Driven Ball Valves Motor-Driven Butterfly Valves Motor-Driven Valves Motorized Ball Valves Needle Valves NEMA Solenoid Valves Non-Return Valves NSF/ANSI-Standard Butterfly Valves NSF/ANSI-Standard Float Valves Oil Check Valves Oil Metering Valves Oil Sight-Feed Valves Oil Solenoid Valves On/Off Valves One-Way Air Valves One-Way Flow Valves Orifice Valves Oval-Handle Ball Valves Oxygen Service Valves Panel-Mount Ball Valves Panel-Mount Needle Valves Panel-Mount Toggle Valves Panel-Mount Valves Parker Hannifin® Gold Ring-Compatible Solenoid Valves Parker Valves Pedal Valves Petcock Valves PFA Check Valves Piercing Saddle Valves Piercing Valves Pilot Air-Actuated Valves Pilot Control Valves Pilot Valves Pilot-Operated Regulating Valves Pilot-Operated Solenoid Valves Pinch Valves Pipe Check Valves Piston Check Valves Piston Solenoid Valves Piston Valves Plastic Air-Actuated Valves Plastic Pressure Regulating Valves Plastic Regulating Valves Plastic Solenoid Air Control Valves Plug Valves Plumbing Valves Pneumatic Condensate Drain Valves Pneumatic Control Valves Pneumatic Drain Valves Pneumatic FRL Lockout Valves Pneumatic Isolation Valves Pneumatic Lockout Valves Pneumatic Regulating Valves Pneumatic Solenoid Control Valves Pneumatic Solenoid Valves Pneumatic Valves Pneumatically-Actuated Valves Polyester Needle Valves Polyester Pinch Valves Polypropylene Air-Actuated Valves Pop-Off Valves Poppet Check Valves Poppet Valves Pop-Safety Valves Precision Orifice Valves Precision Valves Pre-Rinse Spray Valves Pressure Regulating Valves Pressure Relief Valves Pressure Valves Pressure-Maintaining Relief Valves Pressure-Reducing Valves Propane Tank Valves Propane Valves Proportional Ball Valves Proportional Solenoid Valves Proportional Valves ProPress-Compatible Valves Pulse Valves Purge Valves Push-Button Air Directional Control Valves Push-to-Connect Check Valves Push-to-Connect Needle Valves Push-to-Connect Plug Valves PVC Air-Actuated Valves PVC Union Ball Valves Quarter-Turn Valves Quick-Exhaust Relief Valves Quick-Exhaust Valves Quick-Release Valves Radiator Valves Reduced Pressure Zone Valves Refrigerant Valves Regulating Valves Release Valves Relief Valves Reverse-Acting Valves Rotary Airlock Valves Rotary Valves Rupture Disc Valves Saddle Valves SAE Thread Ball Valves SAE Thread Valves Safety Air Exhaust Gate Valves Safety Lockout Air Relief Valves Safety Lockout Slide Valves Safety Lockout Valves Safety Mixing Valves Safety Relief Valves Safety Shut-Off Valves Safety Valves Safety Wash Station Mixing Valves Sample Valves Sampling Valves Sand Blasting Valves Sand Metering Valves Sanitary Pressure-Regulating Valves Sanitary Quick-Clamp Valves Schrader Valves Screw-In Valves Selector Valves Service Valves Shower Valves Shut-Off Control Valves Shut-Off Fire-Safety Valves Shut-Off Garden Hose Valves Shut-Off Plug Valves Shut-Off Solenoid Valves Shut-Off Valves Shuttle Valves Sight-Feed Valves Silent Check Valves Sillcock Valves Sink Faucet Valves Sleeve Valves Slide Gate Valves Slide Sleeve Valves Slide Valves Sloan Flush Valves Snap-shut Valves Soap Dispenser Valves Soft-Start Valves Solenoid Control Valves Solenoid Valves Solenoid Valves for Lubrication Pumps Speed Control Valves Spool Valves Spring Check Valves Spring-Return Ball Valves Sprinkler Valves Stainless Steel Air Control Valves Stainless Steel Air-Actuated Valves Stainless Steel Air-Driven Ball Valves Stainless Steel Pop-Safety Valves Stainless Steel Vacuum-Breaking Valves Standard Solenoid Valves Standard Toilet Flush Valves Steam Air-Actuated Valves Steam Service Ball Valves Steam Service Valves Steam Trap Valves Stop Cock Valves Stop Valves Strainer Valves Suction Strainer Foot Valves Suction Valves Sump Pump Check Valves Sump Pump Valves Sweat-End Ball Valves Sweat-End Gate Valves T & P Valves Tamper-Resistant Air Flow Control Valves Tamper-Resistant Valves Tandem Valves Tank Valves Tap Valves Temperature Control Valves Temperature Regulating Valves Tempering Valves T-Handle Ball Valves Thermostatic Mixing Valves Thermostatic Valves Three-Piece Ball Valves Three-Way Air Directional Control Valves Three-Way Air Valves Three-Way Ball Valves Three-Way Plug Valves Three-Way Solenoid Valves Three-Way Valves Throttle Butterfly Valves Throttle Globe Valves Throttle Needle Valves Throttle Valves Timer Drain Valves Timer Valves Tire Valves Tire-Style Valves Toggle Valves Toilet Fill Valves Toilet Flush Valves Toilet Shut-Off Valves Toilet Tank Flush Valves Toilet Valves Torch Check Valves Touch-Free Faucet Valves Triple-Union Ball Valves Truck Valves True Union Ball Valves Tubing Ball Valves Tubing Gate Valves Tubing Globe Valves Tubing Pinch Valves Tubing Toggle Valves Tubing Valves Two-Way Air Valves Two-Way Valves Union Ball Valves Union Check Valves Union Connection Ball Valves Unloader Valves Vacuum Ball Valves Vacuum Check Valves Vacuum Isolation Valves Vacuum Regulating Valves Vacuum Relief Valves Vacuum Valves Vacuum-Breaking Bleed Valves Vacuum-Breaking Valves Valves Vented Ball Valves Vented Gate Valves Venting Valves Wafer Check Valves Wafer Valves Wash Station Mixing Valves Washing Machine Shut-Off Valves Washing Machine Valves Washing Machine Water Valves Waste Valves Water Flow Control Foot Valves Water Flow Control Valves Water Fountain Valves Water Heater Valves Water Mixing Valves Water Supply Shut-Off Valves Wedge-Handle Ball Valves Welding Check Valves Welding Torch Check Valves Welding Torch Valves Whistle Globe Valves Whistle Valves Wye Valves Yor-Lok Toggle Valves Y-Pattern Check Valves Y-Strainer Ball Valves Y-Style Ball Valves Y-Style Check Valves Y-Style Valves Zero-Loss Drain Valves Zinc-Alloy Pinch Valves Zinc-Alloy Valves Zone Control Valves

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About On/Off Valves

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Threaded Isolation On/Off Valves for Chemicals

Valve Type: Ball
For Use With: Acetone, Air, Ammonia, Argon, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Fuel Oil, Gasoline, Helium, Isopropyl Alcohol, Kerosene, Krypton, Liquid Argon, Liquid Carbon Dioxide, Liquid Nitrogen, Liquid Oxygen, Methanol, Neon, Xenon, Xylene
Ball Material: 316 Stainless Steel
Seal Material: PEEK Plastic
Seat Material: PTFE Plastic
Specifications Met: ANSI/ASME B16.34

Attach gauges or sensors to these valves so you can remove them for maintenance and calibration without depressurizing your line. Also known as block and bleed valves, turn the handles to block both upstream and downstream flow, drain the liquid trapped in the valve through the bleed port, and then remove your instrument from the gauge port. Often used in chemical-processing lines, these valves have a PEEK seal and a corrosion-resistant 316 stainless steel body. All are standard port, so they slightly restrict flow.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

	Gauge Port
Pipe Size	Pipe Size	Gender	Thread Type	Flow Coefficient (Cv)	Max. Pressure	Temperature Range, °F		Each
316 Stainless Steel Body
NPT Female × NPT Female

1/2	1/4	Female	NPT	6.4	10000 psi @ 170° F	-65° to 450°	0000000	0000000

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)

Threaded Isolation On/Off Valves for Chemicals