Ball Check Valve

A RELIABLE INVESTMENT 

Bray’s SlurryTuff™ brand includes the MAXI-CHECK line of ball check valves and  ball check isolation valves. Available in high pressure high wear, low pressure &  low wear and dual function check/isolation models. They are designed to prevent  reverse flow, and in the case of the Model I, prevent reverse flow with isolation. 

OPERATING CONDITIONS

> Specifically designed for extreme applications, such as slurry, ash disposal, and  mine dewatering that produce heavy scale (such as salts). 

> CWP of 7 to 150 bar (100 to 2175 psi). > Standard operating temperature up to 80°C (176°F).

APPLICATIONS OPERATING FEATURES

Engineered for slurry service, MAXI-CHECK operating features include:  > Full bore design — provides unrestricted flow ensuring low pressure loss and  minimum back pressure to seal. 

> Large port — prevents clogging. 

> High-wear resistant seat and ball design — offers large sealing area, to provide  drip-tight sealing under all conditions. 

> Sinking ball design – preferred for applications involving viscous liquids or slurries. > Self-cleaning — the ball rotates during operation eliminating the risk of impurities  adhering to the ball. 

> Fabricated design — low weight and allows for inline repairs. 

> Operation — suitable for horizontal or vertical applications

> Slurry pipelines 

> Power plant ash disposal

> Mine dewatering 

> Pipelines with scale

> Pulp & paper 

> Water & wastewater

> High pressure pipelines 

SPECIFICATIONS 

Purpose Non Return | Isolation 

Size Range DN 80 to 750 | NPS 3 to 30 Temperature Range Up to 80°C | Up to 176°F 

Pressure Ratings^1,2 ANSI B16.5 Class 150/300/600 & 900  @ 65°C (150°F) Nominal 

Connection³ Flanged ANSI B16.5 RF  

Class 150/300/600 & 900 (or as requested) 

DESIGN STANDARDS 

Valve Design ASME B16.34 

Flange Drilling ASME B16.5 

Process Piping ASME B31.3 

Testing AS 4037-1999 

EN 12266 Pt 1 & 2 

API 598 

CUSTOMIZABLE FOR YOUR NEEDS 

Long-lasting and maintenance-free, all MAXI-CHECK valves are built to meet  and exceed the high demands of heavy duty slurry ball check valves. Optional  confi gurations, materials, and linings allow customization to suit your specifi c  requirements. 

MATERIALS & OPTIONS 

> Body & outlet materials include carbon steel, 316/304 stainless steel. Optional: Duplex and super duplex stainless steel. 

> Exterior epoxy coatings suitable for highly aggressive environments. > Standard inner lining of natural rubber, with nitrile or bromobutyl options. > Replaceable ball available in stainless steel, silica bronze/urethane-coated  aluminum materials.  

> Replaceable seat in 304 stainless steel or hardened carbon steel  (matched to the ball). 

> Drain/fl ush port in body. 

HIGH PRESSURE SEAT, BALL & SEAL DESIGN 

NOTES 

1 ANSI 150 as standard, consult Bray for other pressure ratings. 

2 All Bray valves are tested to 110% of rated pressure to ensure bubble-tight shutoff. 

3 All international fl anges available on request.  

Contact Bray for more information. 

3 of 16 ©2020 BRAY INTERNATIONAL. ALL RIGHTS RESERVED. BRAY.COM 

For high-pressure applications over 35 bar, the Model H &  Model I valves use a 40 SHORE hardness molded rubber  annular seal. 

Bubble tight shut-off is achieved by back pressure forcing  the seal against the ball. 

NOTES 

1 Shown with Silica bronze sinking ball. 

2 Molded rubber annular seal. 

3 Stainless steel seat. 

AVAILABLE MODELS

MODEL I | High Pressure • Dual Function 

Ball Check Valve with Isolation 

This valve features mechanical isolation ensuring the  ball is held in the closed position. The valve comes fully  lined with natural rubber, and polyurethane coated ball  as standard. It can be confi gured to suit your particular  service conditions with a choice of liner materials, ball  types and actuation options.  

(refer to page 5 for material options) 

When the pump starts, the pressure forces the ball off  the seat and into the tower. When the pump stops,  the ball returns to the seat and is held in the closed  position by the back pressure creating a positive seal.  The valve can now be isolated using the bevel gear  operator or actuator to mechanically hold the ball in  the seat to achieve valve isolation.  

MODEL H | High Pressure • High Wear 

Ball Check Valve 

The valve utilizes the same valve design as the fully featured model I. However it does not provide valve  isolation. The valve can be confi gured to suit your  particular service conditions with a choice of liner  materials and ball types. (refer to page 5 for material  options) 

MODEL L | Low Pressure • Low Wear 

Ball Check Valve 

Robust, simple and cost-effective one-piece body.  Designed with the same face to face dimensions as a  swing check allows a direct replacement without the  need for pipe modifi cations and spool pieces. The valve comes unlined as standard.  

However, rubber-lined is available on request.  Bubble tight shut-off is achieved by back pressure  forcing the ball against the integral body steel seat. The advantage of this compact design is a single  moving part and no external components ensuring  ongoing reliability.

FEATURES & BENEFITS | MODEL I 

1 ORIENTATION: Suitable for horizontal or vertical  installations without any customization required. 2 CONSTRUCTION: Full bore design and simple  construction ensures low pressure drop and minimum  back pressure to seal. 

3 BALL: Self cleaning urethane-coated, aluminum core,  stainless steel or silica bronze ball rotates with the  fl ow, preventing scale build up.  

4 PRIMARY SEAT: The seat is designed for full-bore  fl ow, and constructed of material selected specifi cally  for slurry and heavy-duty applications. 

5 BODY: Fully fabricated from carbon steel for low  weight and ease of customization. Lined with a choice  of three materials. 

6 ON-SITE INSPECTION: Removable bonnet fl ange for  valve inspection, cleaning, or maintenance. 

7 SEAL TO ATMOSPHERE: Standard nitrile o-rings are  used for a high-pressure seal.  

8 END CONNECTION: Available in a wide range of end  connections, including ANSI and DIN. 

9 BODY COATINGS: The external body have a minimum  coat of 250 micron DFT. The body is coated with a  hard, two-part epoxy paint, applied in a Bray standard  red fi nish, that provides excellent corrosion and wear  resistance. 

10 FASTENERS: Fasteners are high tensile galvanized  carbon steel structural grade. 

11 LABEL PLATE: The stainless steel label details valve  model and serial numbers. 

12 FLUSH PORT: Based on valve size, either ¹⁄₂ or 1 inch  maintenance, or for fl ushing when required. 

13 APPROVED LIFTING LUG: To aid during installation,  or removal.

14 VALVE ISOLATION: Can be achieved with manual,  pneumatic, hydraulic or electric actuation.

FEATURES & BENEFITS | MODEL H 

1 ORIENTATION: Suitable for horizontal or  vertical installations without any customization  required. 

2 CONSTRUCTION: Full bore design and simple  construction ensures low pressure drop and  minimum back pressure to seal. 

3 BALL: Self cleaning urethane-coated, aluminum  core, stainless steel or silica bronze ball rotates  with the fl ow, preventing scale build up.  

4 PRIMARY SEAT: The seat is designed for  full-bore fl ow, and constructed of material  selected specifi cally for slurry and heavy-duty  applications. 

5 BODY: Fully fabricated from carbon steel for  low weight and ease of customization. Lined  with a choice of three materials. 

6 ON-SITE INSPECTION: Removable bonnet  fl ange for valve inspection, cleaning, or  maintenance. 7 SEAL TO ATMOSPHERE: Standard nitrile  o-rings are used for a high-pressure seal. 

8 END CONNECTION: Available in a wide range  of end connections, including ANSI and DIN. 

9 BODY COATINGS: The external body have  a minimum coat of 250 micron DFT. The  

body is coated with a hard, two-part epoxy  paint, applied in a Bray standard red fi nish,  that provides excellent corrosion and wear resistance. 

10 FASTENERS: Fasteners are high tensile  galvanized carbon steel structural grade. 

11 LABEL PLATE: The stainless steel label details  valve model and serial numbers. 12 FLUSH PORT: Based on valve size, either ¹⁄₂ or  1 inch fl ush port is fi tted to de-pressurise the  valve during maintenance, or for fl ushing when  required.

FEATURES & BENEFITS | MODEL L 

1 ORIENTATION: Suitable for horizontal or vertical  installations without any customization required. 

2 CONSTRUCTION: Full bore design and simple  construction ensures low pressure drop and minimum  back pressure to seal. 

3 BALL: Self cleaning urethane-coated, aluminum core,  ball rotates with the fl ow, preventing scale build up.  

4 SEAT: The seat is integral to the one piece fabricated  body machined to suite the ball — creating a positive  seal under all conditions. The seal is created by the  urethane coating and the back pressure on the surface  of the seat. 

5 BODY: Fully fabricated from carbon steel for low  weight and ease of customization. Lined with a choice  of three materials. 

6 ON-SITE INSPECTION: Removable bonnet fl ange for  valve inspection, cleaning, or modifi cation. 

7 SEAL TO ATMOSPHERE: Standard nitrile o-rings are  used for a high-pressure seal.  

8 END CONNECTION: Available in a wide range of end  connections, including AS, PN, ANSI and DIN. 

9 BODY COATINGS: The internals (if not rubber lined)  

and external body have a minimum coat of 250  micron DFT. The body is coated with a hard, two-part  epoxy paint, applied in a Bray standard red finish, that  provides excellent corrosion and wear resistance.  

10 FASTENERS: Fasteners are high tensile

11 LABEL PLATE: The stainless steel label details valve model and serial numbers. 

12 FLUSH PORT: (Not shown) Based on valve size, either ¹⁄₂ or 1-inch fl ush port is fitted to de-pressurise the valve during maintenance, or for flushing when required 

13 APPROVED LIFTING LUG: To aid during installation or removal. 

ISOLATION AND SHUT-OFF VALVES THAT FIT YOUR PROCESS 

At Bray, we understand you are constantly faced with the need to safely and reliably isolate many different types of processes. To make this easier, Bray has an extensive isolation valve portfolio comprised of high-performance butterfly valves,  ball valves, and knife gate valves. These valves are designed and tested to provide the reliability necessary to keep your processes operating at maximum efficiency. 

BIDIRECTIONAL KNIFE GATE VALVES SERIES 740 

One-piece cast body with flexible wire reinforced elastomer  seat for bidirectional zero leakage shutoff in a wide range of  

Other related products  

Knife Gate Valves

Butterfly Valves