Key Features

Pilot-assisted pressure sustaining valve
Maintains minimum upstream pressure
Automatic back pressure control
Responds automatically to flow demand
Helps protect pumps and upstream equipment
DN50 to DN1000 flange sizes
304 or 316 stainless steel construction
Patented cylindrical piston design
Exceptionally high flow capacity
Straight-through low-loss flow path
Externally mounted pilot controller
Pilot serviceable without valve removal
Pressure gauge included
Adjustable sustaining pressure
Maximum inlet pressure 25 Bar
Pressure tested to 38 Bar
Pressure ranges from 0.5 to 8 Bar
Alternative pressure ranges available
PN16 flange connection as standard
ANSI, JIS and alternative flange options
NBR or FKM (Viton) seals
Suitable for fluids up to +80°C
Suitable for light oils up to 50 cSt
Mountable in any position
Heavy-duty industrial construction

Datasheets

Description

Flanged Stainless Steel Pilot-Assisted Pressure Sustaining (Back Pressure) Valve – Z-Tide Industrial BFS-S Series

The Z-Tide Industrial BFS-S Series is a heavy-duty flanged pilot-assisted pressure sustaining (back pressure) valve designed to automatically maintain a minimum upstream pressure in high-flow water and compatible fluid systems.

Manufactured in either 304 or 316 stainless steel, the BFS-S Series provides precise upstream pressure control, automatically modulating the main valve to maintain the selected minimum back pressure despite changes in downstream demand or flow. This makes it particularly suitable for protecting pumps, upstream equipment and process systems where a minimum supply pressure must be maintained.

Available from DN50 to DN1000 with PN16 flanges and optional ANSI 150 lb, JIS10K, JIS20K, PN10 or PN20 flange standards, the BFS-S is ideally suited to industrial water distribution, cooling circuits, water treatment, chemical processing, food and beverage production and other demanding process applications.

Valve function & operation

Function: Pilot-assisted pressure sustaining (back pressure) valve

Externally piloted pressure control

Operating principle: Pressure-assisted piston with external pressure sustaining pilot

Maintains a constant minimum upstream pressure

Pressure gauge displays sustained pressure

Flange sizes: DN50 to DN1000 PN16

Optional flange standards:

ANSI 150 lb

JIS10K

JIS20K

PN10

PN20

Other flange standards available on request

Pressure & regulation

Maximum inlet pressure: 25 Bar

Pressure tested to: 38 Bar

Pressure sustaining ranges:

0.5 to 4 Bar

2 to 8 Bar

Additional pressure ranges available on request

Maximum media temperature: +80°C

Minimum media temperature: -15°C

Maximum media viscosity: 50 cSt

Mounting position: Any position

Construction & materials

Body: 304 or 316 stainless steel

Pressure tested to 38 Bar

Cylinder: 304 or 316 stainless steel

Piston: 304 or 316 stainless steel

Seat: 304 or 316 stainless steel

Internals: Stainless steel

Spring: 304 stainless steel

Standard seals: NBR

Optional seals:

FKM (Viton)

Media compatibility

✓ Water

✓ Process water

✓ Cooling water

✓ Light oils up to 50 cSt

✓ Fluids compatible with the valve materials

Pressure Control & Performance

✓ External pilot continuously monitors upstream pressure

✓ Automatically maintains the selected minimum upstream pressure

✓ Modulates flow in response to changing downstream demand

✓ Helps prevent excessive upstream pressure loss

✓ Helps protect pumps and critical upstream equipment

✓ Pressure gauge provides continuous indication of sustained pressure

✓ Patented cylindrical piston provides exceptionally high flow capacity

✓ Straight-through flow path minimises pressure loss, turbulence and hydraulic noise

✓ External pilot assembly can be serviced without removing the main valve from the pipeline

✓ U-ring sealing system provides reliable long-term operation

Applications

Industrial water distribution

Process water systems

Cooling water circuits

Chemical processing

Food and beverage manufacturing

Pharmaceutical production

Water treatment plants

Pump protection systems

Corrosive process fluid control

General industrial process control

Manufacturing quality

Manufactured using heavy-duty 304 or 316 stainless steel with precision-machined stainless steel internal components, the Z-Tide Industrial BFS-S Series has been engineered for demanding industrial environments where corrosion resistance, reliability and precise upstream pressure regulation are essential. Its pilot-assisted pressure sustaining controller continuously monitors upstream pressure and automatically adjusts the main valve to maintain the selected minimum back pressure, protecting pumps, upstream equipment and critical process systems regardless of downstream demand. The patented cylindrical piston design provides exceptionally high flow capacity while the externally mounted pressure gauge allows simple commissioning, adjustment and routine monitoring. The removable pilot controller further simplifies maintenance by allowing servicing without removing the main valve body from the pipeline.

Ordering information

Simply select the required body material (304 or 316 stainless steel), flange size, pressure sustaining range, seal material and flange standard before adding the valve to your basket. Alternative pressure ranges, flange standards, seal materials and custom sizes up to DN1400 (56") are available on request.

Related Products & Categories

Pressure Reducing Valves

Pressure Sustaining Valves

Safety Pressure Relief Valves

Z-Tide Manufacturing Product Range

View Technical Specification

Technical Specification

Brand: Z-Tide Co Ltd

Model: BFS-S

Width: 95.00 mm

Height: 95.00 mm

Depth: 190.00 mm

Weight: 12.00 kg

Valve / Product Type: Pressure Sustaining Valve

Body Material: Stainless Steel

Port Size: 4 inch Flange DN100 , 5 inch Flange DN125 , 6 inch Flange DN150 , 8 inch Flange DN200 , 10 inch Flange DN250, 12 inch Flange DN300 , 14 inch Flange DN350 , 16 inch Flange DN400 , 18 inch Flange DN450 , 2 inch Flange DN50, 20 inch Flange DN500 , 21/2 inch Flange DN65 , 3 inch Flange DN80

Operation: Pressure Assisted from 0.5 Bar

Pressure: 0.2 Bar (200 mBar), 0.3 Bar (300 mBar), 0.4 Bar (400 mBar), 0.5 Bar (500 mBar), 0.6 Bar (600 mbar), 0.7 Bar (700 mBar), 0.8 Bar (800 mBar), 1 Bar, 1.2 Bar, 1.3 Bar, 1.4 Bar, 1.5 Bar, 1.6 Bar, 2 Bar, 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar, 7.5 Bar, 8 Bar

Seals: NBR, FKM (Viton)

Media: Fluid (Non Aggressive), Fluid (Slight Acid/Alkali), Water, Water (RO/Pure/Demin)

Orifice: 125mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 50mm, 65mm, 80mm

Found in these Categories

Pressure Sustaining Valves

DN50-200 Pressure Sustaining Valve Stainless Steel 0.2-8 Bar

£1,247.40 incl. VAT £1,039.50 ex. VAT

-40% Was ~~£2,079.00~~ incl. VAT

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Brand: Z-Tide Co Ltd

Model: BFS-S

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