Your partner with global connections

- SMX International, is an international Organisation based in Canada
- We service markets globally through a network of strategically-based offices
- Well known for design capability, timely manufacture and customer support
- Producer of high-integrity Non Slam Check Valves for difficult and critical applications
- Product conforms to international quality standards
- Wholly owned subsidiary of Grayloc Products Canada

Technical and manufacturing achievements

- Products are manufactured to the highest industry standards
- Materials and manufacturing routines are fully traceable
- Industry best practices (health and safety, environmental, etc) reflected in day-to-day activitie
- Extensive research and development expertise using CFD, FEA and CAD technology

Serving industry across the globe

Upstream/downstream oil and gas
Petrochemical, refining and processing
Coal gasification and liquidation
Fossil and nuclear power
Synthetic fuel
Aerospace
Environmental
Gas Compression

Strategically-based support
Modern 30,000 sq ft manufacturing facility in Ontario, Canada with full in-house design and development resource, supporting

North American centre: Houston, USA
European centre: Cardiff, UK
Middle East centre: Abu Dhabi

Purpose of a Check Valve

Prevent reverse flow
Reverse flow can damage rotating equipment designed to rotate in one direction
Reverse flow in liquid applications can result in valve slamming and pressure surges with potentially catastrophic damage to piping systems

Good Piping Practice
Velocity :- optimum is 2.5-3.00 m/sec, high velocity acquaints with quick return velocity
Correct sizing of pipework and valves
Maintain 5 pipe diameters between check valve and items that disrupt flow such as pump, elbows, valves etc

Check Valve Types
Swing Check
Dual Plate
Actuated Butterfly

Non Slam Nozzle Type\
Others, Tilting Disc, Poppet, Lift, Hoerbiger Disc Type

Swing Check

Prone to slamming due to slow closure time and back of plate exposed to reverse flow
Closure member is always in the flow and reacts to every aspect of the flow (flaps), seldom fully open

High pressure drop
Effective for use in non critical use such as pipelines where flow speeds are low and viscous fluid.

Dual Plate
Quick Closure, lightweight, spring assisted closure

Reasonably good pressure drop
Gradually developed from a special to a commodity
Non-Slam Nozzle Type Check Valves

Suitable for higher velocities
Tailor made
Intrinsically Dampened

Operating Principles
Opening :- The velocity of the medium is increased by the reduced valve inlet area
Velocity is further increased in the minimal flow area resulting in a low pressure area behind the disc
The increase in velocity and reduction of pressure behind the disc assists in easier opening of the disc.

Wish List for Non Slam Valves
Quick Closure
Low Pressure Drop
Low Maintenance
Easy disassembly
Flexibility to adjust to service conditions

Applications
Gas Compression
Fertiliser Production – Ammonia Gas
Gas / Water Injection
Water Pumping :- Potable / Seawater / Produced Water

SMX Design criteria
To utilise the SMX in-depth knowledge of nozzle check valve fundamentals
To optimize a simple, robust and well proven design concept
Use innovative engineering, a trademark of SMX

SMX Design criteria
Allow spring replacement without major valve disassembly
Zero leakage without the use of elastomers (soft seat option)
Body construction to allow internal cladding
SMX End Product
Springs replaceable without major valve disassembly
Lightweight webbed disc design
Ultra Short Stroke

SMX Design tools
Advanced computer flow modeling (CFD)
Computer stress modeling(FEA)
Flow testing

SMX End Product
Springs replaceable without major valve disassembly
Lightweight webbed disc design
Ultra Short Stroke

SMX End Product
The dual spring action permits the use of a lower torque primary spring to facilitate easier opening combined with a higher torque secondary spring to assist quicker closure

SMX Summary
Prevents damage to upstream piping and components when flow reverses
Minimizes pressure loss during normaloperation
Very fast dynamic, non-slam response reduces destructive return flow (water hammer effect)
Design standards: ASME B16.34, API 6D,CSA Z245.15
Sizes from 2” to 60” diameter
Pressure ratings from ASME Class 150 through to 4,500 and up to API 10,000
End connections: RF, RTJ, FF, BW, compact flanges and clamp connectors
Available in a wide variety of body and trim materials - stainless steel trim standard