Check Valves
Swing | Piston | Dual Plate | Ball
Swing Checks
THREADED CHECK VALVES
COMPACT PIPING / BACKFLOW PREVENTION
Compact threaded check valves designed for dependable backflow prevention in oilfield and industrial piping systems. Available in multiple materials and pressure ratings to match a wide range of applications. Ideal for small-bore and threaded piping configurations.
VIEW ALL THREADED CHECK VALVES >>
Download Product Data Sheet >
Highlights
- CVD Series (ductile iron) and CVC Series (carbon steel WCB) configurations available
- Sizes 1″ to 3″ with pressure ratings from 300 to 5,000 PSI NSCWP
- Female NPT end connections; stainless steel disc standard across all models
- Viton seat standard for reliable sealing across a broad temperature range
- NACE MR0175/ISO 15156-1 compliant on all models; tested per API 598
- Top-entry body design allows field inspection and repair without line removal
- Ideal for production manifolds where compact backflow prevention is needed
Application
- Backflow prevention on production manifolds and oil and gas flowlines
- Salt water disposal and produced water handling systems
- Chemical injection lines and wellhead production service
- Sour gas and corrosive production environments requiring NACE-compliant materials
FLANGED SWING CHECK VALVES
PIPELINE SERVICE / RELIABLE BACKFLOW CONTROL
API 6D flanged swing check valves designed for reliable backflow prevention in pipeline and process systems. Built for durability with consistent sealing performance, they handle demanding oil and gas service conditions. Ideal for critical applications where flow assurance is required.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- API 6D monogrammed; design and materials per API 6D and ASME B16.34
- Sizes 2″ to 24″; pressure classes 150 through 2500
- O-ring cover seal for in-line repairability (RTJ gasket on Class 2500)
- Full-opening piggable design with lock-open option
- 316 stainless steel clapper standard; oval disc-to-shaft connection for durability
- Body material options: carbon steel WCB, low temp carbon steel LCC, and stainless steel CF8M
- Fire safe design per API 6FD; NACE MR0175/ISO 15156 compliant
Application
- Pipeline and transmission systems requiring API 6D certified backflow prevention
- Oil and gas production, gathering, and processing facilities
- Piggable pipeline systems requiring full-bore swing check protection
- Sour service and corrosive environments requiring NACE-compliant materials
Brass Check Valves
GENERAL PURPOSE / CORROSION RESISTANT
General-purpose brass valves designed for reliable flow control across a wide range of media. Corrosion-resistant construction ensures dependable performance in water, oil, gas, and light industrial applications. Ideal for compact installations where cost-effective durability is required.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Ball, gate, and check valve configurations available in a single product family
- Sizes 1/4″ to 4″ with pressure ratings from 200 to 600 PSI NSCWP
- Threaded and grooved end connections available across valve types
- Highly resistant to corrosion across a wide range of process media
- Chrome-plated ball with PTFE seat and locking handle on ball valve models
- Quick-opening and standard gate valve designs available for different operational needs
- Check valve options include metal-seated, O-ring style threaded, and O-ring style grooved
Application
- General-purpose flow control and isolation on water, oil, and gas service
- Vacuum trucks, tank trucks, and well servicing vehicles
- Production facilities and light industrial piping systems
- Applications requiring a compact, economical, corrosion-resistant valve solution
Cast Steel Check Valves
HIGH PRESSURE / HIGH TEMPERATURE SERVICE
Bolted bonnet cast steel valves built for demanding service in oil and gas and industrial systems. Manufactured to API standards with low-emission packing, they provide long-term sealing performance and reliability. Designed for high-pressure and high-temperature applications.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Gate, globe, and swing check configurations in sizes 2″ to 12″, Class 150–600
- Designed to API 600 (gate), API 623 and BS 1873 (globe), and API 594 (swing check)
- Full NACE MR0103 and MR0175/ISO 15156 compliance standard on all models
- Low-emission packing per API 622; fugitive emissions tested per API 624 to under 100 ppm
- Stellite 6 faced seating surfaces for superior wear and corrosion resistance
- Production tested and inspected per API 598; independent final QC inspection standard
- Available with handwheel, gear operator, or bare stem configurations
Application
- Isolation, regulation, and backflow prevention on oil and gas production and gathering pipelines
- Refinery and petrochemical process piping requiring low-emission valve performance
- Sour service and corrosive environments requiring NACE-compliant materials
- Industrial process facilities requiring API-certified gate, globe, and check valve solutions
THIN WAFER CHECK VALVES
SPACE SAVING / LOW PROFILE INSTALLATIONS
Space-saving wafer check valves designed for efficient backflow prevention in pipeline and process systems. Lightweight construction reduces installation time while maintaining dependable sealing performance. Ideal for applications where space and weight are critical.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Sizes 2″ to 12″, ASME Class 150, 300, and 600
- API 6D 24th Edition design; tested per API 6D and CSA Z245.15-17
- Short-pattern unibody forged steel construction minimizes leak paths
- Built-in body seal o-rings eliminate the need for separate flange gaskets
- Stainless steel clapper material standard across all body material options
- Lightweight alternative to full-body swing check valves; saves space and reduces installation time
- NACE MR0175/ISO 15156 compliant; Canadian Registration Number approved
Application
- Compressor and pump discharge backflow protection
- Gas gathering, transmission pipeline, and process piping check valve service
Piston Checks
PISTON CHECK VALVES
INLINE FLOW CONTROL / HIGH PRESSURE SERVICE
The Guardian Series non-slam piston check valves are engineered to reduce backflow-related wear in demanding pipeline and process applications. Designed for smooth operation and long service life, they provide reliable performance in critical oil and gas service.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- API 6D monogrammed; ASME B16.34; ISO 14313; CSA Z245.15-17
- Sizes 2″ through 12″; ASME Class 150, 300, 600, 900, and 1500; RF and RTJ end connections
- Non-slam piston design reduces wear in reciprocating compressor and pump discharge service
- Top-entry flange for in-line inspection and internal repair without line removal
- WCC carbon steel, LCC, or CF8M stainless steel body; 410 or 316 SS piston; integral seats
- LT HNBR 90 or Viton GLT 90 seal options; NACE MR0175/ISO 15156-1 compliant
Application
- Compressor and pump discharge backflow protection
- Gas gathering, transmission pipeline, and process piping check valve service
Dual Plate Wafer Checks
DUAL PLATE CHECK VALVES
COMPACT DESIGN / HIGH PERFORMANCE BACKFLOW CONTROL
Dual plate wafer check valves designed for high-pressure backflow prevention in space-constrained systems. Compact design reduces installation footprint while maintaining strong sealing performance. Ideal for demanding oilfield and industrial applications.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Sizes 2″–8″, ASME Class 150–1500; API 594 and ASME B16.34 design
- Retainerless body design eliminates through-body holes to minimize leakage risk
- All body seating surfaces overlaid with Stellite 6 for superior wear resistance
- Spring-assisted dual plate design for reliable shutoff in both horizontal and vertical (flow-up) service
- Inconel X-750 springs for high-temperature and corrosion resistance
- Full NACE MR0175/ISO 15156 and API 6FD fire-safe compliance standard
- Available in carbon steel, low temp carbon steel, and stainless steel body materials
Application
- Backflow prevention in high-pressure oil and gas production and processing service
- Hazardous, corrosive, and sour gas applications where body integrity is critical
- Horizontal and vertical pipeline installations requiring compact wafer-style check valves
- Refinery and petrochemical service in Class 900 and 1500 high-pressure applications
Ball Checks
INLINE CHECK VALVES
COMPACT PIPING / LOW PRESSURE DROP
Compact inline check valves designed for high-pressure backflow prevention in instrumentation and small-bore piping systems. Ball-type design ensures reliable sealing with minimal pressure drop. Well suited for corrosive and high-pressure environments.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Sizes 1/8″ to 1″; maximum pressure rating 6,000 PSI at ambient temperature
- All-stainless steel construction: 316 SS body and outlet, 304 SS ball and spring
- Viton o-ring seal for reliable performance in chemically aggressive environments
- Male by female NPT end connections for straightforward inline installation
- Maximum operating temperature 250°F; pressure rating 4,900 PSI at maximum temperature
- Compact inline design suitable for tight installation spaces on instrument tubing
- NACE MR0175 compliant for sour service applications
Application
- Chemical injection and instrumentation backflow prevention on oil and gas facilities
- Small-bore process piping, instrument tubing, and high-pressure sampling systems
- Preventing backflow into chemical injection pumps and metering systems
- Corrosive and sour service applications requiring full stainless steel construction
GRAVITY BALL CHECK
SIMPLE DESIGN / RELIABLE BACKFLOW PREVENTION
Gravity ball check valve designed to prevent backflow in injection systems and protect upstream equipment. Built for reliable, maintenance-friendly operation, it performs consistently in demanding environments. Ideal for applications requiring dependable backflow protection.
GO TO PRODUCT PAGE >
Download Product Data Sheet >
Highlights
- Stops backflow from tubing when tubing pressure exceeds injection line pressure
- O-ring sealed cap threads protected from line flow and corrosion
- One- and two-inch sizes; threaded, union, or socket weld connections
- ANSI 1500 pressure rating; nickel aluminum bronze or 316 SS construction
Application
- Waterflood injection tubing backflow prevention
- Inline with FET Injection Tees in surface injection assemblies
- CO2 injection backflow protection