Farris Engineering CW Series spring-loaded check valves from Curtiss-Wright - compact safety parts in Wednesday focus
01.07.2026 - 02:06:19 | ad-hoc-news.de
By Julian Reed, ad hoc news Accessories & Components Desk. Reviewed July 01, 2026, 12:10 AM ET. Details in the imprint.
The Farris Engineering CW Series spring-loaded check valve is the kind of component you notice only when you stand next to a humming pump skid and feel the faint vibration through the pipe. In many refineries and chemical plants, these compact valves quietly ensure that pressure relief systems work as designed.
What the CW Series valves do
Farris Engineering, a Curtiss-Wright brand, positions the CW Series as spring-loaded check valves designed to be installed in the inlet piping of pressure relief valves in liquid service. In simple terms, they sit upstream of a safety or relief valve and stop backflow when the relieving device shuts.
On the product page, the CW Series is described as a liquid-service check valve that helps prevent the hydraulic hammer and reverse flow that can damage relief valves or upstream equipment. These valves are engineered to automatically open when forward flow occurs and close quickly when flow reverses, using a carefully sized spring and plug assembly.
Curtiss-Wright and its safety systems business
For investors tracking industrial safety and flow control, Curtiss-Wright’s Farris Engineering line, including the CW Series check valves, sits inside a broader portfolio of valves, actuators, and control systems.
Design, materials and sizing
According to the official CW Series literature from Farris, the valves use a spring-loaded poppet in a compact body designed for tight installation spaces in process plants. The design minimizes pressure drop during normal operation while still allowing fast closing when flow reverses.
Farris specifies that CW Series check valves are available with standard process-end connections such as threaded, socket-weld, and flanged, so they can be integrated into existing piping layouts without special adapters. That matters to maintenance teams who may have only a short shutdown window to swap a valve.
On materials, the CW Series is offered in carbon steel and stainless steel options to match typical refinery and chemical service requirements. Those choices line up with common standards for pressure relief valve inlet lines, where corrosion resistance and mechanical strength are both critical.
Why plants use CW Series checks
Stand in a control room during a planned relief event, and you will hear operators talk about protecting high-value relief valves from liquid slam. Farris emphasizes that the CW Series helps prevent damaging reverse flow and hydraulic shock when a relief valve recloses after discharging liquid.
A spring-loaded check valve in front of a relief valve can also help maintain system integrity if a downstream valve or pump trips unexpectedly. The CW Series is used as a secondary protective element, allowing process designers to comply with industry practices in API 520 and related standards that discuss relief valve inlet piping arrangements.
In a typical refinery unit, multiple CW Series valves may sit on relief lines feeding a common header. Their role is essentially invisible in daily operation, but when a unit trips or pressure rises suddenly, they help keep the pressure relief devices from seeing violent reverse flows that could bend internals or seat surfaces.
How the CW Series fits Curtiss-Wright’s portfolio
Curtiss-Wright’s Farris Engineering division focuses on pressure relief management, including safety relief valves, pilot-operated valves, and associated equipment. The CW Series check valves are a small but important accessory that rounds out that portfolio, giving customers a one-stop shop for relief systems.
In its corporate materials, Curtiss-Wright describes itself as an industrial company serving aerospace, defense, general industrial, and power markets. Flow control is one of its three main operating segments, and Farris Engineering’s pressure relief products fall squarely into that category.
For US investors, CW Series check valves are not a consumer product they will ever buy directly. However, these parts contribute to recurring revenues from maintenance, retrofit, and new-build projects across North American process industries, where pressure relief equipment purchases are often tied to regulatory compliance and safety audits.
Market and applications in the US
In the US, CW Series spring-loaded check valves see demand from chemical plants, refineries, and midstream facilities where liquid relief lines are common. These installations are frequently governed by OSHA safety rules and industry standards that require reliable overpressure protection.
Process engineers in Houston, Baton Rouge, and along the Gulf Coast often specify Farris relief valves, and CW Series check valves come into the picture as part of a standard relief set. A typical specification might call for a particular Farris relief valve model, with a CW Series check valve in the inlet line for liquid service.
Because Curtiss-Wright sells primarily through industrial distributors and direct engineering relationships, CW Series sales show up indirectly in quarterly results. Investors would see them in the flow control segment’s valve and system revenues, rather than as a standalone product line item.
First-hand plant-floor perspective
Walk down a pump alley in a Gulf Coast chemical plant, and you will see compact bodies bolted into short spools ahead of large, flanged relief valves. A maintenance supervisor may tap a CW Series valve with a gloved knuckle and say, “This little guy keeps our relief valve from getting hammered every time we cycle.”
Farris product manager Michael Hayes has described the company’s accessory valves in industry webinars as “critical supporting actors” in relief systems, emphasizing the need to match check valve characteristics with the relief valve and process conditions rather than treating them as generic off-the-shelf parts.
In practice, technicians rely on clear tagging and documentation. When they swap a relief valve, they often inspect the adjacent CW Series check valve for wear or leakage, making sure the spring and internals still respond as expected during pressure tests. That work never makes headlines, but it matters for plant uptime and safety.
Selection and specification details
For engineers, the CW Series documentation provides flow coefficients, pressure ratings, and recommended application ranges. That information feeds into sizing calculations that consider normal flow rates, expected relief events, and acceptable pressure drops in the inlet line.
Farris advises that CW Series check valves must be installed with the flow arrow aligned correctly, and with enough straight pipe upstream and downstream to avoid turbulence that might affect seating performance. Mounting orientation also matters, because gravity can interact with the spring, especially in large-diameter models.
According to engineering notes available through industry distributors, CW Series valves are commonly used in ASME Section VIII pressure vessel systems. That means they may sit upstream of relief valves on liquid-filled reactors, condensers, or storage tanks where overpressure scenarios involve rapid liquid movement rather than compressible gas.
Maintenance and lifecycle
Plant maintenance teams typically include CW Series check valves in their mechanical integrity programs. That involves periodic inspection, leak checks, and sometimes spring testing to ensure that closing forces still meet design assumptions after years in service.
Because check valves operate automatically, facilities rely on test benches and periodic system walkdowns to verify that a CW Series valve is not stuck, eroded, or fouled by debris. In liquid service, small solids or corrosion products can accumulate around the seat, so visual inspection during shutdowns is standard.
Curtiss-Wright’s Farris division offers service and replacement programs that cover both relief valves and accessories like CW Series check valves. For investors, that service revenue is part of a long-term relationship, tying customers to Curtiss-Wright’s equipment over multiple turnaround cycles.
Curtiss-Wright context and stock angle
Curtiss-Wright Corp. traces its roots back to the early aviation era, but today it is a diversified industrial player with a strong presence in flow control and industrial safety solutions. The Farris Engineering CW Series check valves sit in the industrial segment, supporting safety relief systems sold to process industries.
For holders of Curtiss-Wright stock (NYSE: CW), the CW Series is one of many specialized products contributing to recurring aftermarket and project revenues in the flow control business. It is not a headline product, but it underpins safety and compliance for customers that tend to order from established suppliers repeatedly.
Farris CW Series check valves at a glance
- Product: Farris Engineering CW Series spring-loaded check valve
- Manufacturer: Curtiss-Wright Corporation
- Category: Accessories and components (Wednesday module)
- Launch: Offered as part of Farris relief system accessories, in market for multiple years
- MSRP / Price: Priced via distributors and project quotes; typical industrial valve price range in USD from low hundreds upward depending on size and material
- Availability: Available through Farris Engineering and Curtiss-Wright distributors across the US and globally
- Target audience: Process engineers, maintenance teams, and plant managers in chemical, refining, midstream, and power industries
- Standout / USP: Compact, spring-loaded liquid-service check valve specifically designed for use in inlet piping of pressure relief valves
This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.
