Check Valves for High-Pressure Systems up to 60,000 PSI

A check valve lets fluid or gas move through the flow path in one direction only and closes on its own when flow reverses. It needs no actuator, handle or operator. BuTech non-return valves protect pumps, compressors and instruments in high-pressure gas and liquid systems. They're available in low-, medium- and high-pressure classes, with dedicated designs for hydrogen, sour gas and subsea service, and ratings up to 60,000 psi (4,140 bar).

How Check Valves Work?

All BuTech valves are designed around a spring-loaded closing element. A spring holds the ball or poppet against its seat in the closed position. When upstream pressure reaches the cracking pressure, the seat lifts and flow begins. When that pressure drops or reverses, the spring and the back-pressure push the seat shut again, which is how these valves prevent reverse flow.

The standard cracking pressure is about 15 psi (1 bar). Many models can be set as high as 100 psi (7 bar): you add the pressure you need to the catalog number. For example, a 60BC9 set to 50 psi is ordered as 60BC9-50.

Because the spring starts closing the valve before flow fully reverses, a spring-loaded design shuts faster than a gravity- or flow-dependent one. This limits the slamming and pressure surges that cause water hammer.

Key Features

Automatic backflow prevention with no actuation
Spring loaded closing for fast, positive shutoff
Low-, medium- and high-pressure classes up to 60,000 psi
Metal-seat, soft-seat and Twin-Seal options
316 stainless steel bodies, with specialty alloys available
NPT and cone-and-thread connections
15 psi standard cracking pressure, adjustable up to 100 psi
Dedicated hydrogen, sour gas and subsea designs

Browse by Type

Low Pressure Check Valves

BuTech ball check valves prevent reverse flow where leak-tight shutoff is not necessary. Standard materials of construction are 316 stainless steel with 17-4PH poppet for longer life, and 300 series stainless steel spring.

Medium Pressure Check Valves

Butech medium pressure check valves engineered to prevent reverse flow and protect system components.

High Pressure Check Valves

Pipe Check Valves

Prevent reverse flow and safeguard critical systems with high-performance stainless steel ball, O-ring, and twin-seal check valves rated for pressures up to 15,000 PSI.

Sour Gas Check Valves

Built for H₂S service and compliant with NACE MR0175 / ISO 15156.

Hydrogen Check Valves

Rugged construction provides assurance of fail-safe operation at pressures up to 20,000 PSI (1378 BAR). For operation in temperatures ranging from -320° to 500°F (-195° to 260°C).

Subsea Check Valve

Subsea check valves are externally sealed for depths to 14,000’ (4200 meters)

Which Type of Check Valve Do You Need?

Unlike butterfly valves, ball valves and other manually operated types of valves, a non-return valve works entirely on its own. The best design depends on line size, pressure and how tight the seal needs to be:

Swing check valves use a hinged flap that swings open with flow. They suit large-bore, low-pressure lines such as water supply mains.
Foot valves sit at the inlet of a pump suction line and keep the pump primed.
Disc check valves use a spring-loaded disc in a compact wafer body. They're common in general industrial piping.
Ball check valves and poppet designs are compact and spring-loaded, which makes them the best fit for small-bore, high-pressure gas and fluid systems.

BuTech specializes in that last category: compact, high-pressure designs engineered for severe service.

Choose the Right Seal

Ball check valves (metal seat) stop reverse flow where you don't need a bubble-tight seal. They're built from 316 stainless steel with a 17-4PH poppet for longer service life, and they operate from -420°F to +1,200°F (-251°C to +648°C).

O-ring models (soft seat) give a leak-tight seal on liquids and gases. Buna-N is the standard O-ring, with Viton, Teflon and Kalrez available for higher temperatures or harsher chemicals.

Twin-Seal models combine both methods. The ball first seals on a Teflon seat. As pressure rises, it moves onto a metal seat, so the metal-to-metal contact carries the load instead of the Teflon. These come in NPT sizes rated up to 15,000 psi.

Applications

In high-pressure systems, check valves are commonly installed wherever a reversal of flow could damage equipment,
contaminate a line or put people at risk. These are the points where BuTech non-return valves do their most important work.

Pump and compressor discharge

When a pump or compressor stops, trips or cycles, the pressure stored downstream tries to push back toward it. A spring-loaded valve on the discharge line closes before that flow reverses. This protects seals, pistons and diaphragms from back-spinning and pressure shock, and keeps the line charged so the system restarts without re-pressurizing from zero.

Hydrogen storage, transport and refueling

Hydrogen systems move gas through several stages of compression, storage and dispensing, and each stage must stay isolated from the one before it. BuTech hydrogen models are made from 316 stainless steel with at least 12.5% nickel to resist embrittlement, and they're rated to 20,000 psi (1,378 bar). That makes them a strong fit for compressor stages, tube trailers, storage banks, refueling stations and fuel cell test rigs.

Chemical injection and dosing

In an injection line, the process stream is often at a higher pressure than the chemical being dosed. Without a non-return valve, process fluid can flow back into the injection line, dilute the chemical or contaminate the supply tank. Soft-seat O-ring models give a leak-tight seal on liquids. Viton, Teflon or Kalrez O-rings can be matched to aggressive chemicals.

Instrumentation and control panels

Transmitters, gauges and analyzers are sensitive to pressure reversal and to contamination from process media. A compact valve in the instrument line keeps flow moving in one direction, protects calibration and extends instrument life. It also takes up little space on a crowded panel.

Test and calibration systems

Pressure test benches build and hold pressure repeatedly. A valve between the pressure source and the unit under test holds pressure on the test side and stops it from reaching the pump or gas booster. With ratings up to 60,000 psi (4,140 bar), BuTech high-pressure models cover burst, proof and cycle testing.

Sour gas processing

H₂S attacks standard materials and can cause sudden cracking failures. BuTech sour gas models are built for this service and comply with NACE MR0175 / ISO 15156. They give dependable backflow protection in wellhead, gathering and gas treatment lines where material integrity can't be compromised.

Offshore and subsea infrastructure

On subsea equipment, a failed valve can mean a costly intervention. BuTech subsea models are externally sealed for depths up to 14,000 ft (4,200 m) and are available in corrosion-resistant alloys, so they deliver long-life reverse-flow protection on hydraulic control lines, chemical injection and wellhead systems.

Industrial gas compression and distribution

Nitrogen, argon, CO₂ and other industrial gases pass through compression stages and manifolds before they reach the point of use. Non-return valves between those stages stop backflow when one compressor unloads, prevent cross-contamination between gas lines and protect cylinders and storage from reverse pressure.

Cryogenic and high-temperature service

Some lines run at extreme temperatures. Metal-seat ball designs operate from -420°F to +1,200°F (-251°C to +648°C), so the same reliable backflow protection works on cryogenic gas lines and high-temperature process lines.

FAQ

It's a self-actuating valve that allows flow in one direction and closes automatically to prevent reverse flow.

Find the Right Valve for Your System

BuTech specialists can help you match the right non-return valve to your pressure, media, temperature and cracking pressure requirements. Contact us for engineering support, specifications or a quote.

Check Valves for Backflow Prevention up to 60,000 PSI