Blacoh
Blacoh specialises in designing and manufacturing fluid control technologies for hydraulic systems. Their most prominent solutions include pulsation dampeners, inlet stabilisers, surge suppressors, leak containment devices, and pressure relief valves.
Blacoh fluid controls are usually incorporated in systems using positive displacement pumps as they create pulsation and hydraulic shock due to the reciprocating nature of their stroking action. And where there are risks of destructive cavitation, thermal expansion, and water hammer, Blacoh devices are the must-have solutions.
Sentry Pulsation Dampeners
The Blacoh Sentry™ AODDampener™ offers a cost-effective solution for optimising airflow in air-operated double diaphragm (AODD) pumps. It mitigates common issues such as water hammer, harmful vibrations, and product degradation while helping to reduce overall energy consumption.
By protecting pumps against premature wear, this pulsation dampener improves the performance and reliability of AODD pumps in demanding applications, including industrial and chemical transfer.
Features & Benefits
- Fits any AODD pump brand with sizes 1, 1.5, 2, and 3 inches
- Compatible with most fluids and a wide range of metal and steel AODD pumps
- Built to protect systems from water hammer and eliminate up to 99% pulsation
- Automatically controls air flow, helping reduce air usage and overall energy costs
- Tested and rated to 1.3 bar
- Machine welded for precise finish
- Easy installation and in-line maintenance
- Simple, reliable design and quick installation
Available Options
- Certifications and testing: ATEX on request
- Connections: male NPT and BSP on request
Key Specifications
- Construction: 316 Stainless Steel Housing | PTFE Diaphragm
- Pump size: 1”, 1.5”, 2”, 3”
- Pressure rating: up to 150 psi (10.3 bar)
- Connections: NPT, BSP, ANSI Flange, tri-clamp;
- Air control: Automatic and EPR Fireworks
Applications
- Suction Stabilization
- Pulsation Dampening
- Surge Absorption
- Back Surge
- Energy Storage
- Compensate for Leaks
- Compensate for Pressure Change
Principle of Operation
Blacoh Pulsation Dampeners work by supplying an equal pressure to the pulsation supplied by the pump. The Dampener delivers this pressure during the low-pressure points of the pump’s operation, as the pressure drops between pump strokes, creating a pulsating flow. The pressure provided by the dampener decreases pressure variations, therefore producing a steady flow from your Diaphragm Pump.
Sentry Inlet Stabiliser
Blacoh Sentry™ Inlet Stabilisers are protective devices installed at the inlet of air-operated diaphragm pumps. They are engineered to balance the load on the diaphragm by accumulating fluid during suction and smoothing out pressure spikes. This ensures a consistent flow and pressure as the fluid enters the pump.
By reducing strain on the diaphragm, these stabilisers significantly enhance the pump’s efficiency and extend its diaphragm life.
Features & Benefits
- Helps AODD pumps run more efficiently, minimising energy loss and maximising output
- Cushions pressure spikes, reducing stress on the diaphragm and extending its life
- Protects system components from excess stress and vibration
- Eliminates acceleration head loss and cavitation
- Smoothens inlet fluid flow and ensures complete pump chamber fill during suction
Available Options
- Available in chargeable and automatic air control
- Available in plastic and metal construction
Key Specifications
- Sizes: 12.7mm to 76.2 mm
- Connection: Flange and FNPT
- Capacity: Up to 37.85 li
- Body Material: Polypropylene and Stainless Steel
- Bladder Material: Buna-N, EPDM, PTFE and Viton
- Temperature Range: -51°C to 176.67°F
Applications
- Food & beverages
- Dairy
- Oil, fat, sauce and mayonnaise
- Brewing and beverages
- Bakery and confectionery
- Pharmaceutical
- Chemical
- Water and wastewater treatment
- Transportation
Principle of Operation
As the inlet ball valves close in an AODD pump, the fluid flow stops abruptly, causing a pressure spike known as “water hammer.” The inlet stabiliser absorbs this pressure spike along with the accompanying surge of liquid. By maintaining consistent suction pressure and flow, the inlet stabiliser helps ensure the pump operates at peak performance.
Sentinel Pressure Relief Valves
Blacoh Sentinel Pressure and Back Pressure Relief Valves are instruments for preventing siphoning and stabilising dosage rates.
Diaphragm back pressure valves are designed to enhance the performance of pumping systems by applying continuous back pressure to the system pump, while also acting as an anti-syphon valve. On the other hand, Diaphragm Pressure Relief Valves are designed to protect pumping systems from damage caused by excessive pressure, which is often the result of defective equipment or blockage in the pump line.
Features & Benefits
- Robust construction, high reliability, low cost
- Compact Size for OEM Applications
- Adjustable spring pressure from 0.34 – 24.13 bar
- 3 Port, 2 Port & 90° Configuration
- Vulcanized PTFE/EPDM Diaphragm
- Wide Range of Materials for different applications
Available Options
- Optional 24.13 bar Rated Valve
- Hybrid valve option
- Full range of chemically resistant wetted materials
Key Specifications
- Temperature up to 60°C (Plastic) or 149°C (Metal)
- Capacity up to 7570.82 li (Back pressure relief) or 16277.27 USgal (Pressure relief)
Applications
Municipal
- Water And Wastewater
- Treatment
- Water Supply
Industrial
- Food & Beverages
- Dairy
- Oil, Fat, Sauce And
- Mayonnaise
- Brewing And Beverages
- Bakery And Confectionery
- Pharmaceutical
- Chemical
- Transportation
Principle of Operation
Diaphragm Back Pressure Valves continuously apply positive discharge pressure to the pump system to prevent siphoning. Meanwhile, Diaphragm Pressure Relief Valves start operation when the pressure in the pumping system exceeds the preset pressure of the valve.
Both diaphragms are held against the valve seat by an internal spring. Their operation is triggered when the preset pressure is exceeded. For Back Pressure Valves, the diaphragm is forced up and system fluid flows through the valve to the injection point. Meanwhile, for Pressure Relief Valves, the diaphragm is forced up and system fluid flows out of the relief port, going back to the tank or the pump suction side.
Spillstop Leak Containment
Blacoh’s SPILLSTOP leak containment technology prevents the terrible damage and health hazard that diaphragm failure may cause. A broken diaphragm leads to fluid leak through the air exhaust port, resulting in product wastage, material cleanup, and EPA reporting.
The work of SPILLSTOP is to detect leaks during their early stages and prevent costly and hazardous spills by capturing leaked products while shutting down the failing pump. A warning alarm and backup pump switchover further ensure operators are aware of the leak while preventing prolonged system downtime and enormous production losses.
Features & Benefits
- Wide range of standard and ATEX certified models
- Compatible with all AODD pumps with discharge sizes up to 4 inches
- All Pneumatic, no hazardous electronics or batteries used
- Bodies available in a full range of chemically resistant materials
- US patented spill detector, containment, and prevention
- Cost-effective, compact, high-quality materials, reliable
Available Options
- Warning alarm
- Automatic backup pump switchover options are available
- Custom models
- Pneumatic Whistle Alarm
- Pneumatic-to-Electric Output
- Additional Shutoff Valves
- Custom materials
Key Specifications
- Construction: Polypropylene, PVDF, Stainless Steel, Hastelloy C
- Lid Materials: Noryl, Stainless Steel, PVDF, PTFE Coated Stainless Steel
- Sizes: 19.05 mm – 25.4 mm Inlet
Applications
- Food & beverages
- Dairy
- Oil, fat, sauce and mayonnaise
- Brewing and beverages
- Bakery and confectionery
- Pharmaceutical
- Chemical
- Transportation
Principle of Operation
SPILLSTOP is a fully pneumatic device attached to the exhaust of an AODD pump. It has a sealed internal receptacle that captures the process fluid that would have spilled through the exhaust when an AODD pump’s diaphragm fails. The failed pump automatically shuts down as the contained liquid raises a float switch. SPILLSTOP devices can also be equipped with an optional warning alarm whistle and backup pump switchover. With SPILLSTOP, AODD users can improve plant safety and prevent more extensive system damage.
Blacoh SurgeShield™ Pulsation Dampener
The Blacoh SurgeShield™ Pulsation Dampener serves as a dual-purpose solution, acting as both a shock absorber for peristaltic pumps and a compact bladder-style surge vessel. This device is designed to safeguard pumps and piping from the harmful effects of pulsation and water hammer, reducing the risk of costly repairs and extending the system’s lifespan.
Utilising advanced bladder-style hydropneumatic technology, it provides reliable pressure control without the need for a continuous pressurised air source.
Features & Benefits
- Bladder-style hydropneumatic vessel improves system efficiency by reducing pressure spikes
- Chargeable air control eliminates the need for a constant pressurised air source
- The anti-extrusion button replaces the inlet screen to prevent bladder protrusion without clogs or flow restriction
- Lifting lugs for simpler maneuvering
- Nameplate for easy identification
Available Options
- ASME UM-Stamp certification available (Division VIII, Section I).
- Slim, space-conscious design available.
- Support legs, weld pads, flange bolt braces, laser etching
- Certifications & testing: ATEX, ASME UM-Stamp to Division VIII, Section I standards
Key Specifications
- Housing materials: Stainless Steel, Carbon Steel
- Bladder materials: PVC F-1, PVC J-22, Urethane S-1
- Finish: Stainless steel uncoated; Carbon steel painted blue
- Corrosion allowance: Carbon: 0.125″
- Capacities: 57, 95, 140 li
- Inlet sizes: 4″, 5″, 6″
- Inlet types: ANSI Flange
- Max pressure rating: 250 17.24 bar
- 1/2″ NPT drain connection on inlet flange
- 1/2″ NPT PSV/instrumentation connection on inlet flange.
Principle of Operation
Hose pumps, also known as peristaltic pumps, typically create vacuum pockets at the discharge during operation. This, combined with the pump’s pulsing action, makes it challenging to stabilise the discharge flow and leads to pressure fluctuations. The SurgeShield features a dampening element that expands and contracts to absorb pressure spikes, ensuring a nearly steady flow rate.