Severe Service Valves

Many industrial facilities operate under severe conditions. When harsh operating conditions are present, using an improper valve can lead to persistent and widespread problems.

As a cheaper valve begins to deteriorate, the efficiency of the whole system stands to decrease—and that’s only a minor consequence compared to the potential for failure, injury, downtime and product loss. 

Common operating conditions that will impact valve function and service life may include:

  • Extreme temperatures and pressures
  • Corrosive chemicals
  • Erosive / abrasive conditions
  • Lethal media
  • High cycle applications

All of the above factors can irreparably damage general-use valves. 

Severe Service Valves are engineered to perform under harsh conditions. Incorporating special base materials, innovative sealing mechanisms, and advanced protective coatings, Severe Service Valves survive where other valves would fail. They are a sound investment for facilities that would otherwise incur constant repair or replacement expenses.

Conval, an industry leader in Severe Service Valves for decades, has drawn on that experience to develop the most resilient, cost-effective valves on the market. Our products are designed to withstand the toughest industrial challenges. When maintenance is warranted, Conval products can be serviced in-line. 

All of these features allow our valves to boast the lowest lifecycle cost of any comparable product.

What are Severe Service Valves?

Severe Service Valves (SSVs) are rugged, durable and designed to withstand prolonged exposure to challenging environmental conditions. They are also suitable for applications that require frequent cycling. Standard valves, under such demands, often wear down prematurely and require replacement.

While there is no single industry standard that defines a severe service valve, they do tend to share some key characteristics that facilitate their longevity. For instance, materials of construction for Severe Service Valves are selected based on their ability to withstand extreme temperatures, pressures, corrosive environments, erosive conditions, or high cycle needs based on the specific applications.

At Conval, we employ a comprehensive process of testing, analysis to optimize every feature of a new valve from its materials of construction to its sealing integrity. 

When You Need Severe Service Valves

There are many applications requiring Severe Service Valves.  Most designs are intended for use in the following cases:

  • Extreme temperatures. A general-purpose valve is simply not sufficient in applications where piping frequently reaches temperatures below -100° F or above 1,200° F. Severe Service Valves are designed to withstand temperature extremes without leaking or failing.
  • High pressure. Most valves are susceptible to leakage at very high pressures or when pressure conditions fluctuate. Severe Service Valves are designed to maintain sealing integrity.
  • Abrasive media. Solids, sediments, or particulate matter of any kind pose a significant risk to general-purpose valves. Even small solids can abrade a valve’s surface, increasing susceptibility to further damage (e.g. erosion). The sealing surface of a Severe Service Valve will generally be treated to mitigate this risk. 
  • Corrosive service.  Corrosion-resistant materials and surface treatments are essential if a valve is to function under chemical exposures.

Industries for Severe Service Valves

There are a number of industries that are more likely to incur these challenges. Some of the best candidates for Severe Service Valves include the following industries:

  • Process plants
  • Chemicals and Petrochemicals
  • Metal and Mineral mining
  • Oil & Gas (including Upstream, Midstream, and Downstream operations)
  • Power generation
  • Nuclear plants

This list is far from complete, so any company that operates a high-risk process can benefit from replacing their valves with more durable severe service options.

Selecting Severe Service Valves 

It’s important to consider a facility’s processes before investing in Severe Service Valves. Not all applications warrant the same interventions, and not all Severe Service Valves are created equal. 

One consideration is the degree to which valves will be exposed to erosive and corrosive influences. High-velocity flow and corrosive chemical transport present substantial obstacles in terms of component lifespan, so it’s critical to assess Severe Service Valves carefully to ensure that they can withstand these demands.

In particular, look for Severe Service Valves that are forged from appropriate alloys, and consider carefully what pressure and temperature ratings are necessary for your application. 

Common Severe Service Conditions

Any Conval valve can be ordered to customer specifications, ensuring that our valves are suitable for the specific conditions of an application. Conval’s use of modular design and  interchangeable parts make it easy to alter a standard valve to be even more resistant to severe service conditions.

Some of the application challenges with which we have experience include the following:

  • Cavitation
  • Flashing
  • Outgassing
  • Noise
  • Corrosion
  • Erosion
  • Particulate matter
  • Vibration
  • Lethal media
  • High pressures
  • Extremely high or low temperatures
  • High cycle

The combination of these variables should be the key determinant when choosing the components used in your final valves. A Conval representative can guide you toward the optimal choices.

Conval’s Severe Service Valves

Conval’s state-of-the-art Severe Service Valves are appropriate for any and all of the applications discussed above. We also offer a variety of standard valve configurations to accommodate various process conditions, further increasing the versatility of our product offerings. 

CLAMPSEAL® Globe Valves

For harsh conditions, we offer CLAMPSEAL® globe valves in a Y, Angle, and T-pattern body styles, including both stop and stop check options. An Integral Gland Wrench (IGW) makes packing adjustments simple with no tools required.

Our globe valves are streamlined with a single-piece gland, eliminating unnecessary complexity while still incorporating the IGW. The low-emission design is complemented by a full range of accessories and end connections to allow easy installation into any system.

Swivldisc® Gate Valves

The Conval Swivldisc® wedge gate uses an innovative flexible disc to achieve optimal alignment between seating surfaces, forming a tighter seal than a standard wedge gate can permit.

Our gate valves exemplify the same commitment to quality and in-line reparability as our other offerings while still incorporating innovative features like an advanced pressure-actuated backseat and a high-performance graphitic packing system.

Camseal® Ball Valves

Conval’s Camseal® Top Entry single forged body design effectively eliminates the potential for leakage due to pipeline stresses, unlike two-piece, end entry or side entry designs.  The top entry design allows for rebuilding the valve in line, without any welding or stress relieving. 

The proprietary coating and finishing process ensures reliable performance through thermal cycles, operational cycles and erosive system fluids.  An easy-to-read stem and ball alignment indicator ensures sustainable shutoff and accurate instrumentation adjustment.

CLAMPSEAL® Strainers

Clampseal strainers are simple and rugged pipeline components, engineered to efficiently entrap entrained solids flowing within process pipelines.

Utilizing a wide range of strainer element hole sizes, they are available in angle, Y or T body configurations and feature in-line disassembly for element cleaning or change out .  As with all Clampseal products, the internals are standard subassemblies, interchangeable within all body patterns.


Conval Whisperjets promise a safe, affordable mechanism for handling pressure drops that can otherwise lead to erosion, and cavitation. To do this, the Whisperjet directs an input stream through a series of pressure-reducing stages that minimize the velocity and pressure of the media. These devices also address noise issues, and like all Conval products, perform excellently for years.

Clampseal® Check Valves

Lightweight Conval check valves use just two moving parts to allow or deny fluid flow, enabling simple and smooth operation year after year. Piston, ball, and stop checks are available in a variety of body styles.

Use Conval Severe Service Valves to Safeguard Piping Systems

Conval’s in-line repairable valves, are the most trusted name in Severe Service Valves. Conval  offers the most customizable high-performance products in the industry. If you expect your valves to experience high pressures, extreme temperatures, or corrosive conditions, Conval Severe Service Valves are the best investment you can make to increase the longevity of your piping system. 

Our products quickly pay for themselves by extending the service life and minimizing the need for regular maintenance. Please contact us for more information about what the transition would look like for you.