A. What is the advantage of a bolted bonnet design?

- Simplifies disassembly and access to internal components for maintenance or repair, reducing downtime.

B. How do bolted bonnet swing check valves differ from welded bonnet swing check valves?

- **Bolted Bonnet:** Easier maintenance, can be disassembled for inspection/repair.

- **Welded Bonnet:** More permanent solution, generally lower cost upfront but requires cutting and re-welding for maintenance.

C. What factors influence selecting a bolted bonnet swing check valve?

- **Pressure and Temperature Ratings:** The valve needs to be rated for the specific operating conditions of your application.

- **Pipe Size and Flow Rate:** Choose a valve with the appropriate size and flow capacity for your piping system.

- **Fluid Compatibility:** The valve materials must be compatible with the fluid being controlled to avoid corrosion or degradation.

- **Maintenance Requirements:** If easy access for maintenance is important, a bolted bonnet design is preferable.

D. What are the maintenance requirements for bolted bonnet swing check valves?

- They typically require minimal maintenance. Periodic inspection is recommended to ensure proper operation, identify wear on the disc or sealing surfaces, and potentially replace parts if necessary. The bolted bonnet design simplifies this process.

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Check Valves

Bolted Bonnet Swing Check Valve

Classic swing disc check valve with low pressure drop for general liquid and gas service.

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Overview

Bolted bonnet swing check valves are a popular choice for various industrial applications due to their reliable operation, ease of maintenance, and suitability for high-pressure systems.

Key features

Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel, Titanium Alloy & Carbon Steel with Internal Corrosion Resistant Alloy (CRA) Overlay
Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel, Titanium Alloy & Carbon Steel with Internal Corrosion Resistant Alloy (CRA) Overlay
Bolted Bonnet Design: The valve body and bonnet (upper cover) are securely connected using bolts and a gasket. This design allows for easy disassembly and access to internal components for inspection, maintenance, or repair.
Swing Disc: A hinged disc pivots within the valve body, allowing flow in one direction and closing to prevent backflow.
Stainless Steel or Forged Steel Construction: Materials are chosen for durability, corrosion resistance, and pressure rating requirements.
Internal Spring (Optional): Some designs incorporate a spring to aid in disc closure, ensuring positive shutoff even at low flow rates.
Variety of Connections: Available with flanged, screwed, or welded connections for compatibility with various piping systems.

Technical specifications

Size Range: 2 – 56 NPS, DN50 - DN1400
Body Materials: Temperature Range
-29°C to 650°C: Trim Materials
Maximum Allowable Operating Pressure: ASME 150# to 2500#
Pressure-Temprature Rating: ASME B 16.34
Construction Details: Bolted Bonnet
Body Style: Flanged End, Butt Weld
Design Standard: API 6D, API 594, BS 1868
Flange Drilling: ASME B16.5
Testing Standard: API 598, API 6D
Face To Face: ASME B16.10
Applications: Refineries,Hydrocarbon,Energy and Process industries.
Operation: Auto

Applications

Refineries
Hydrocarbon
Energy and Process industries.

Benefits

Easy Maintenance: The bolted bonnet design simplifies access to internal components for inspection, cleaning, or replacement of parts, reducing downtime for maintenance activities.
Reliable Shutoff: The swing disc design ensures positive sealing, preventing backflow even under demanding conditions. The optional spring further enhances shutoff at low flow rates.
High-Pressure Capability: Bolted bonnet construction allows these valves to handle high pressures due to the secure connection between the body and bonnet. The choice of materials (stainless or forged steel) also contributes to pressure rating.
Leak-Proof Sealing: The gasket between the bonnet and body, along with the proper disc sealing mechanism, minimizes the risk of leakage.
Versatility: Available in various materials, sizes, and connection options to suit a wide range of applications.

Frequently asked questions

Application engineering

Specify your requirement.

Share your process conditions, required configuration and quantity. Our team will confirm suitable options and available documentation.