Armstrong Armstrong CVW40SS Wafer Type Lift Check Valve

Armstrong International, a leading U.S. brand of industrial valves known worldwide for innovative fluid control solutions, offers the CVW40SS pinch lift check valve, the star of its CVW-40 series, designed for modern industrial piping systems. The valve features an advanced lift structure that automatically prevents backflow of media and ensures safe and efficient system operation. Whether in high temperature steam environments or daily hot water circulation systems, the CVW40SS provides excellent protection against backflow damage, energy waste and production interruption.

The CVW40SS valve is a compact, lightweight, all-stainless steel valve with high corrosion resistance that supports high pressure environments up to PN40 and a wide operating temperature range of -25°C to 425°C. Unique "cam" positioning design allows for quick and easy installation, with integration in minutes, and is suitable for a variety of flange connection scenarios. flange connection scenarios. As a zero-leakage, high-reliability check valve, it has become the solution of choice for the chemical, energy, manufacturing and HVAC industries.

Core Specifications and Parameters

The CVW40SS series offers a wide range of specification options to meet different flow rates and system requirements. The following are key technical parameters:

• Nominal diameter (DN)The range of pipes is from 15mm (1/2″) to 100mm (4″), covering a wide range of applications from small pipes to large industrial lines.
• connection method: Clamping flange (RF raised face or FF flat seal), compatible with standard flanges up to PN40 (HG20592).
• pressure rating::
  • Maximum working pressure at room temperature: 4.0 MPa.
  • Shell test pressure: 6.0 MPa.
  • Minimum opening pressure: approximately 0.01 MPa (101.93 mm water column).
• temperature range: -25°C to 425°C (steam without shock).
• Material composition::
  • Valve body, flapper, bonnet: ASTM A351 CF8 stainless steel (high strength, corrosion resistance).
  • Spring: 304 stainless steel (ensures fast, reliable closure).
• Dimensions and weight reference table(Unit: mm, Weight: kg):

These specifications ensure that the CVW40SS is stable at high pressures and temperatures and is suitable for use with hot water, condensate, oil and other non-corrosive media.

Product Advantages

More than just a simple check valve, the CVW40SS incorporates the essence of Armstrong's engineering to provide multiple benefits:

• Efficient protectionThe valve flap opens automatically under medium pressure and closes instantly with a spring when the flow stops, with zero risk of backflow, protecting pumps, compressors and other downstream equipment from water hammer.
• Easy installationCompact clamping design eliminates the need for additional brackets; the "cam" mechanism is automatically centered for mounting in any plane (horizontal, vertical or inclined), saving time and labor costs.
• durable and reliable: All-stainless steel construction resists corrosion and fatigue for decades of service life; low maintenance requirements require only periodic cleaning of the sealing surfaces.
• economical: Small size and light weight, reducing material consumption; supports a wide range of media, cost-effective and suitable for budget-sensitive projects.
• Safety Compliance: Conforms to international standards and the housing is tested under high pressure to ensure safe operation in harsh industrial environments. Not suitable for use with pulsating fluids, but this also avoids potential failure.

With faster response times and lower leakage rates than traditional check valves, the CVW40SS is ideal for upgrading existing systems.

application scenario

The CVW40SS is used in a wide range of industrial scenarios where backflow of media needs to be prevented:

• Steam and hot water systems: Used in boiler circulations, heat exchangers to prevent backflow of hot water or steam and improve energy efficiency.
• Condensate Recovery: Installed downstream of the steam trap to avoid condensate backflow and optimize the recovery process.
• Oil and chemical piping: Handles lubricating oils or non-corrosive chemicals, ensuring one-way flow and reducing the risk of contamination.
• HVAC and Data Centers: Protects against backflow in the cooling circulation system, maintains constant temperatures, and supports green building certification.
• Energy & Manufacturing: Reliable fluid control for power plants, petrochemicals and food processing.

Whether it's a small plant or a large infrastructure, the CVW40SS integrates seamlessly to enhance overall system performance.

Installation and Maintenance Guide

Installation steps

1. preliminary: Verify that the system is unpressurized and shut down the upstream equipment. Check that the direction of the valve body arrow is consistent with the media flow.
2. position valve: Place the CVW40SS between the two flanges and insert standard gaskets and long bolts.
3. Fixed and centered: Rotate the valve body so that the "cam" contacts the bolts to achieve automatic centering; tighten the bolts in diagonal sequence (refer to flange standards for torque).
4. test (machinery etc): Pressurize gradually and check for no leaks. Avoid proximity to pulse shock sources after installation.

Maintenance recommendations

• Daily inspections: Clean sealing surfaces and monitor valve and spring condition quarterly.
• Replacement parts: If spring replacement is required, remove valve cover (valve up), install new part vertically and tighten. Evacuate system before operation.
• fault resolution: Leakage is mostly caused by dirt, just clean it; replace the spring when it fails. Refer to the official manual for professional diagnosis.