Brand: Bray International

Bray Series 19/19L Segmented Ball Control Valve, NPS 1 to 16

Name: Bray Series 19/19L Segmented Ball Control Valve – Datasheet
Brand: Bray International
SKU: Series 19/19L

Description

Control valve for slurries, fibres and viscous media

The Bray Series 19 and Series 19L are segmented ball valves for modulating control and on-off service in gas, liquid and slurry applications. Bray describes them as combining the preferred traits of a knife gate valve, a globe valve and a ball valve: the sharp leading edge of the segment cuts through viscous media, the trailing edge offers a customizable V-profile for precise control, and a split-stem design gives an uninterrupted flow path comparable to a ball valve.

The Series 19 is the standard service version, suited to slurries with suspended solids or fibres, viscous fluids, pulp, paper, chemicals and wastewater sludge. The Series 19L is the severe-service version for heavy erosion, with erosion-resistant downstream liners and seats, ultra-hard coating options, bearing seals and a pressure-balanced seat design. Rangeability is 300:1 with three standard port options (standard, 60 degree and 30 degree), and custom characterization is available.

Technical specifications

Parameter	Specification
Size range	NPS 1 to 16 (DN 25 to 400)
Pressure ratings	ASME Class 150, 300, 600; PN 10, 16, 25, 40
Temperature range	-50 to 500 deg F (-46 to 260 deg C)
Body style	One-piece
End connections	Flanged; flangeless (S19 only)
Port	Standard, 60 degree, 30 degree; custom on request
Flow characteristic	Equal percentage
Rangeability	300:1
Leakage, resilient seat	Class VI per ANSI/FCI 70-2 and IEC 60534-4 (clean liquid or gas)
Leakage, metal seat	Class IV per ANSI/FCI 70-2 and IEC 60534-4
Valve design	ASME B16.34
Face to face	ISA 75.08.02 flanged; ASME B16.10; Bray internal standard for flangeless
Flange drilling	ASME B16.5; EN 1092-1
Top flange	ISO 5211
Body materials	WCB; CF3M (316L); CF8M (316); CG8M (317); LCB; LCC
Segmented ball	CF8M; CF8M with hard chrome or specialized hard coatings
Stem	17-4 PH; Nitronic 50 (XM-19); SMO 254; super duplex UNS 32760
Seat	Tek-Fil; CF8M with Stellite 6, chrome carbide or solid tungsten carbide
Packing	PTFE or graphite
Certifications	ATEX, CRN, PED, TSG, TR CU, UA.TR.089, PE(S)R UKCA S.I. 2016:1105
Fugitive emissions	ISO 15848

Source: Bray datasheet EN_SDS_S19; Bray also publishes pressure and temperature tables and a part number selection guide for the S19.

Standard and severe-service construction

The one-piece body gives a rigid shell for pipe loading and eliminates leak paths. A splined stem-to-segment connection gives efficient torque transmission with low hysteresis and reduced deadband, the self-centering segment is oriented by a specially designed shaft pin, and the seat spring keeps constant force on the seat at low differential pressure while optimized sealing diameters lower seat torque at higher pressure. The seat can be replaced without removing the segment and shaft.

The interchangeable seat design lets users choose a resilient seat for general-purpose, moderate-temperature, light-solids service or a metal seat for industrial processes with moderate solids. The 19L adds a flanged retainer for external access to the seat and liner, and customizable severe-service coatings for erosion and corrosion.

When to specify a segmented ball valve

Use it where a globe valve would clog or erode, where an on-off ball valve gives poor control, or where the medium is fibrous or contains solids: pulp and paper stock, sugar and ethanol, mining slurries, wastewater sludge and refinery services. It can be automated with Bray positioners such as the Series 6A or 6P and with Bray pneumatic or electric actuators. Please provide the Cv or flow range, differential pressure, medium and solids content, temperature, leakage class and actuator signal.

Model	Characteristic	Typical use
Series 19 / 19L (this page)	Segmented ball, equal percentage, 300:1	Slurry and fibre control
V-Control V-port ball valve	V-port characterized ball, F15/F30 or Triad body	Throttling control
McCannalok 40/41	Double offset butterfly	Large-size process control

Documents and quotation

The Bray datasheet EN_SDS_S19 is attached; the Bray page also lists a product brochure, installation and operation manuals, a safety manual, pressure and temperature tables, a part number selection guide and a recommended specification.

See the wider range of control valves on our catalogue, or send the model name and order number for a quotation.

Datasheets & Documents

Datasheet Bray Series 19/19L Segmented Ball Valve datasheet EN_SDS_S19 Download

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About brand

Bray International is the Houston-based maker of butterfly valves, knife gate and slurry valves, actuators and valve controls. It was incorporated in Houston on 23 April 1986, founded by Craig C. Brown and Frank J. Raymond, and assembled its first butterfly valves in 1987. Among them were the Series 20/21, 30/31 and 35/36 resilient-seated valves that are still in its range.

Seven Star LLC is an independent supplier in Muscat. We list Bray valves, actuators, positioners and switch boxes, and supply complete automated valve packages and spare parts to water, oil and gas and process plants in Oman and the GCC.

Bray at a glance

Established	23 April 1986, Houston, Texas, by Craig C. Brown and Frank J. Raymond
First products	Series 20/21 sanitary and chemical, Series 30/31 general purpose and Series 35/36 large-diameter butterfly valves, first assembled in 1987
Product families	Resilient-seated, high-performance and triple-offset butterfly valves, knife gate and slurry valves, pneumatic and electric actuators, positioners and valve status monitors
Applications	Water and wastewater, desalination, HVAC, chemical, oil and gas, power, mining and slurry service

Bray products we list

Family	Models	Typical use
Resilient-seated butterfly valves	Series 20/21, 22/23 PTFE-lined, 30/31, 32/33, 35/36, 3A/3AH	Water, seawater, HVAC and general utility isolation; PTFE-lined for corrosive chemicals
High-performance and triple-offset butterfly valves	McCannalok 40/41, Tri Lok	Higher pressure and temperature, steam, hydrocarbons and tight shut-off
Knife gate and slurry valves	740, 755, 941, 762, 765, 767, 768	Slurries, sludge, pulp, mining tailings and wastewater solids
Actuators	Series 92/93 rack and pinion, Series 98 scotch yoke, Series 70 electric	Automating quarter-turn valves with air or electric power
Positioners and switch boxes	6A, 6P, 5A, 5C Ex d, Series 54 sensors	Modulating control and open/closed position feedback to the control system

The butterfly valve type follows the duty. Resilient-seated valves seal on a rubber liner, which makes them economical and bubble-tight for water and utilities. High-performance valves use an offset disc and a PTFE or metal seat for higher pressures and temperatures. Triple-offset valves add a third geometric offset so the disc meets the seat without rubbing, which allows a metal-to-metal, zero-leakage seal in steam and hydrocarbon service.

Where Bray valves are used

In Oman and the GCC, Bray valves and actuators are used in water transmission and distribution, desalination and wastewater plants, district cooling and HVAC, petrochemical and chemical plants, power stations and mining and slurry lines.

Ordering Bray valves: what we need

Send the series, size (NPS or DN), end connection (wafer, lug or flanged), body, disc and seat materials, and the medium, pressure and temperature. For actuated valves, add the actuator type (double-acting or spring return), air or electric supply, and any positioner or switch box needed.

Facts checked against Bray company history, October 2026.

Browse Bray International products by category: Control Valves.

FAQ

Questions about the Bray Series 19/19L Segmented Ball Control Valve,

Answers from our engineering team on installation, compatibility and integration.

01What sizes does the Bray Series 19 cover?

NPS 1 to 16 (DN 25 to 400) in ASME Class 150, 300 and 600 and PN 10 to 40.

02What is the rangeability?

Bray prints a rangeability of 300:1 with equal percentage flow characteristic.

03What leakage class applies?

Class VI for resilient seats on clean liquids or gas, and Class IV for metal seats.

04What does the 19L add?

Erosion-resistant downstream liners and seats, severe-service coatings, bearing seals and a pressure-balanced seat.

05Is the seat replaceable in the line?

Bray states the seat is replaceable without removing the segment and shaft.