Segmented Ball Valve Series 19/19L

Bray Series 19/19L segmented ball valve combines the shearing action of a knife gate valve with the control and sealing performance of a ball valve, designed for throttling and on-off applications with Class VI shutoff

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Product Overview

ASME B16.34 certified ball valve for global chemical and mining operations

ASME B16.34 Certified Ball Valve for High Precision and Durability

Bray Series 19/19L segmented ball valve combines the shearing action commonly found in knife gate valves with the control characteristics and sealing performance typical of ball valves. The Series 19 and 19L segmented ball valves feature a wide segmented range, high flow capacity, and excellent rotary control valve performance. Designed for throttling applications, the Series 19/19L segmented ball valves also deliver exceptional sealing performance in on-off applications, achieving Class VI shutoff with resilient trim and Class IV shutoff with metal seat trim.
Series 19/19L segmented ball valves are designed to ASME B16.34 standards with spring-assisted, pressure-balanced seat design. The spring maintains constant pressure on the segment, ensuring effective sealing at low differential pressures, while the pressure-balanced design also ensures effective sealing at full differential pressure with smooth, low-torque operation. The Series 19/19L seat design also directs fluid away from the sealing area, enhancing durability. The one-piece cast body reduces weight, increases rigidity, and eliminates potential leak paths.
Bray’s Series 19L segmented ball valve further enhances the standard Series 19 for high-wear slurry and severe service ball valve applications. Bray’s proprietary advanced coating technology is applied to the internal surfaces of the body and segment to improve hardness and corrosion resistance. This advanced coating technology provides higher bond strength than other commonly used coating technologies throughout the industry. A field-replaceable corrosion-resistant liner is installed in the downstream bore to protect the body from high-velocity abrasive flow media.
Series 19 and 19L segmented valves are available with various coatings and trims for different service conditions, making them ideal for a wide range of industries and applications where increased durability and reliability can extend maintenance intervals, minimize downtime, and increase your profitability.

Technical Specifications

Parameter	Value
Size Range	NPS 1 to 16 / DN 25 to 400
Body Material	Stainless Steel (CF8M), Carbon Steel (WCB), 316L Other materials available upon request
Temperature Range	S19: -50°F to 500°F (-46°C to 260°C) S19L: -50°F to 797°F (-46°C to 425°C)
Maximum Allowable Operating Pressure	ASME 150, 300, 600 EN 1092 PN 10, 16, 25, 40
Stem Material	17-4PH, Nitronic 50 (XM-19), Super Duplex, SMO 254 Stainless Steel
Shutoff Class	Metal Seat: IEC 60534-4 / ANSI / FCI 70-2 Class IV Soft Seat: IEC 60534-4 / ANSI / FCI 70-2 Class VI
Ball Material	Series 19: Stainless Steel (CF8M), CF8M Hard Chrome Plated Series 19L: CF8M with proprietary hard face coating
Body Type	One-Piece
Design Standard	ASME B16.34
Testing Standard	Shell Test - API 598 Seat Leakage - ANSI FCI 70-2
Port	Reduced: 90° (standard), 60°, 30°, custom ball segment profile available
Certification	CRN, ISO 15848, PED, PED(S)R, TR CU, TSG, UA.TR.089
End Connection	Flanged, Wafer
Face-to-Face	Flanged: ANSI/ISA 75.08.02 / ASME B16.10 Wafer: Bray Internal Standard
Seat Material	Resilient Seat: (316) Tek-Fil® Encapsulated Stainless Steel (S19) Metal Seat: (316) Stellite Hardfaced Stainless Steel (S19 & S19L) Solid Tungsten Carbide (S19L)
Application	On/Off and control applications for: pulp and paper, sugar and ethanol production, mining, oil and gas, power generation, refining, chemical, food and beverage, HVAC, and other high-wear slurry applications.

Features and Benefits

A One-Piece Body

Provides a rugged housing capable of withstanding pipe loads and eliminating potential leak paths.

B Splined Stem-to-Disc Connection

Delivers efficient torque transmission and precise control, reducing hysteresis and dead band.

C Self-Centering Ball Segment

Specially designed perfect orientation pins facilitate ball segment self-alignment while simplifying assembly and disassembly during routine maintenance.

D Coating

High-performance coatings on internal components ensure long service life and corrosion resistance.

E Self-Energizing Seat

Seat springs provide constant pressure on the seat to seal the disc at low differential pressures. At higher differential pressures, the optimized seal diameter ensures low seat torque.

F Protected Seal Area

Seat design directs media away from the sealing area.

G Blowout-Proof Stem

Retaining ring installed between machined stem groove and packing gland step.

H Easy Maintenance

Seat is replaceable without removing disc and shaft.

A Corrosion-Resistant Downstream Liner/Seat

Flow reversal prevents body wall erosion caused by high velocity at low openings.

B Severe Service Coating

Customized ultra-hard coating provides application-specific corrosion and erosion resistance for valve internals.

C Bearing Stem Packing

Protects metal bearings from media intrusion.

D Pressure-Balanced Seat Design

Seat seals at full differential pressure for low torque and smooth operation.

E Easy Maintenance

Flanged retaining ring features an uninterrupted gasket surface for easy seat and liner replacement.

F Trim Options

Multiple options available to optimize performance for different levels of corrosive applications.

FAQ

Is the Bray Series 19/19L segmented ball valve suitable for control or on-off applications?

The 19/19L Series is designed for throttling control applications, combining high flow capacity, rotary control performance, and sealing capability. It is also suitable for on-off applications: soft seat trim achieves IEC 60534-4/ANSI FCI 70-2 Class VI sealing, and metal seat trim achieves Class IV sealing.

How should the Series 19 vs 19L segmented ball valve be selected?

Standard Series 19 is suitable for general throttling, on-off, and multi-industry process control conditions. The 19L Series is reinforced for high-wear slurry and severe service conditions. The 19L Series features proprietary hard-face coating on the body and segment bore surfaces, and a field-replaceable corrosion-resistant liner at the downstream port to withstand high-velocity erosive media. Specific configuration should be confirmed based on media abrasiveness, corrosiveness, differential pressure, and temperature conditions.

Why does this valve maintain low operating torque under both low and full differential pressure?

The 19/19L Series uses a spring-assisted, pressure-balanced seat design. Seat springs provide continuous pressure against the segment for effective low-differential-pressure sealing. The optimized seal diameter and pressure-balanced structure enable smooth, low-torque operation under full differential pressure while maintaining sealing performance.

What temperature ranges, pressure ratings, and sizes are available for the 19/19L Series?

Size range is NPS 1 to 16 (DN 25 to 400). Series 19 temperature range is -46°C to 260°C; Series 19L is -46°C to 425°C. Maximum allowable working pressure covers ASME 150, 300, 600 and EN 1092 PN 10, 16, 25, 40. Actual selection should consider body material, seat construction, media, and system design conditions.

Is it necessary to remove the segment and shaft to replace the seat during maintenance?

No. The 19/19L Series features a maintenance-friendly design where seats can be replaced without removing the segment and shaft. The 19L Series flanged retainer also provides a continuous gasket sealing surface for easy replacement of seats and the downstream corrosion-resistant liner. The self-centering segment design facilitates routine assembly and disassembly.