Bailey Valve is an industry-leading internationally distributed valve manufacturer, providing a broad range of valve solutions to meet any industrial and water application. Bailey Valve's diverse offering of sleeve valves are designed in accordance with the needs and standards of each industry. Our Bailey Valve design and application team garnets over 30 years of combined application experience, ensuring you the superior product for your applications. We recognize the highly specialized nature of the “severe service Valve market”, and the demands of the equipment. You will benefit with our superior products and systems performance. Bailey Valve total system life cost can be the lowest available solution for your specific system or custom project needs.

Bailey Valve field engineering services offer customers with in-line service and maintenance on all of our valve products. Our team of engineers and technicians can help you with product start-up, refurbishment, and warranty work.

Bailey Valve development was fueled by customer demand, and it has since grown into a dynamic and diversified company, helping government and industrial clients achieve their goals through the application of innovative technologies. We have been able to meld our original core competencies in engineering valve design with our ever-growing skills in system application to offer a highly desirable and adaptable valve product range.

Innovative products and product improvements are priority at BVI engineering. Let our engineering and application team harness our experience in applying, maintaining and providing valve solutions across the globe for your next project!

sleeve valve benefits

What makes a Bailey Valve superior?

The control of cavitation through the valve.

figure 02-01

The fundamental design of the sleeve valve starts at the core of the valve. The sleeve elements of a sleeve valve contains multiple nozzles arranged in a helical pattern around the sleeve (1) . Each nozzle (2) is tapered to increase the velocity of the water jet as it passes though the restriction. This increase in velocity projects the start point of increased pressure called the vena-contracta, or cavitations (3) beyond the exit of the nozzle. By moving the cavitation away from the exit of the nozzle, turbulence in the nozzle is reduced and will therefore increase the efficiency and reduce the vibrational effects experienced in standard straight through drilling.

figure 02-02
features and benefits


Valve Body: Epoxy Coated Steel or Ductile Iron
Sleeve: 304 or 316 Stainless Steel
Gate: Stellite Hardfaced 304 or 316 Stainless Steel
Seat Ring: 304 or 316 Stainless Steel
Seals: Buna-N


Offer 1:1 Stroke to Diameter Ratio

  • Provides better flow control over short stroke configuration by increasing the sleeve nozzle spacing.
  • Reduces the risk of oscillating the gate on the seat under low flow and high delta P condition.
  • Allows for more cavitation dissipation inside valve compared to shorter stroke valves.
  • Reduces vibrations by spreading discharge energy over broader range compared to shorter stroke valves.
  • High flow turndown allows the use of one valve in lieu of multiple parallel valves and eliminates oscillation off the seat for most applications.

Stellite Hardfaced Gate or Seat Ring

  • Provides superior hard surface edge to reduce high velocity erosion of the gate or wire drawing.
  • Creates dissimilar hardness on sliding contacts.
  • Provides leading edge hardness on the valve sufficient to shear debris without damage to the gate.
  • Custom Valve Configuration

    • Allows for matching flanges between the valve and associated piping.
    • Multiple access port options.
    • Valve material options (Carbon Steel, Stainless Steel).

    valve sizes

    Actuation Configurations

    • Electric Motor Operated.
    • Oil Hydraulic Operated W/ Hydraulic Power unit.
    • Water hydraulic from pipeline pressure.
    • Electro-hydraulic.
    • Pneumatic.

    valve sizes

    Valve Function

    • Pressure reduction.
    • Pressure sustaining.
    • Flow Control.

valve models

B-5 : 3” thru 12” Inline Y-pattern with flanged inlet/outlet.

B-10 : 10” thru 60” Inline valve with flanged inlet/outlet.

B-11 : 10” thru 60” Submerged discharge valve with flanged inlet.

B-12 : 10” thru 60” 90 degree valve with flanged inlet/outlet.

B-14 : 10” thru 60” Open or submerged discharge valve with flanged inlet.

B-16 : 3” thru 60” Fixed orifice valve with flange.

B-5 B-10
B-11 B-12 B-14 B-16

Determing Model and Size of Valve

The Bailey Valve sleeve valve has been designed to incorporate features that provides superior valve performance for inline, angel and terminal flow control and pressure reduction applications. The Bailey Valve sleeve valve dissipates energy and controls flow by diverting the water through multiple orifices located in the sleeve or valve body. The valve modulates flow by sliding an outer pipe called the gate over an inner pipe called the sleeve. This design controls cavitation by directing damaging implosions away from any metallic surfaces, thus reducing vibration and noise normally associated with modulating valves. The nozzle are placed within the sleeve in a helical pattern that allows for specifically desired incremental volume change with movement of the gate. Each sleeve nozzle configuration is designed for the application needs to produce a superior flow and pressure control over the entire requested flow range. Flow passes through tapered nozzles in the sleeve and energy is dissipated during a mixing process in the center of the valve prior to exiting the valve body. The sigma value or cavitation index is calculated and used to configure the performance class of the sleeve valve or to determine if alternate options such as ball valves or butterfly valves are acceptable for the application conditions.

With six models available, the first step in selecting the correct valve for the application is to collect key application data. The operating conditions (key application data) will determine the type (based on cavitation), size (based on volume flow rate) and configuration (Inline, Y-Pattern, submerged, angle or non-modulating).

Step 1

Maximum Flow Rate > Qmax
Inlet Pressure at Qmax > Pi @ Qmax
Outlet Pressure at Qmax > Po @ Qmax
Minimum Flow Rate > Qmin
Inlet Pressure at Qmin > Pi @ Qmin
Outlet Pressure at Qmin > Po @ Qmin

Step 2 - Sigma

The sigma value or cavitation index is calculated and used to configure the performance class of sleeve valve or to determine if alternate options such as ball valves or butterfly valves are acceptable for the application conditions. The following equation is used to calculate the sigma value:

σ = Po - Pv / Pi - Po

valve models

Pi = Inlet Pressure (psig)
Po = Outlet Pressure (psig)
Pv = Vapor Pressure (-14.6 psig for 60°F water at sea level)

Cavitation Chart

Step 3 - Velocity Flow

The maximum flow rate (Qmax) is compared to the figure in the following sample table to determine the corresponding valve size based on an allowable continuous velocity through the valve port. Higher velocities can be attained for intermittent operating conditions and it is recommended that you contact the factory for sizing. Your flow rate should be rounded up to the nearest table value and record the corresponding valve size. Various units are provided for simplicity.

Valve Size Chart