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About usAn industrial and trade fire company integrating the development, production, sales, and service of fire accessories.
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Potter Fire Protection Pressure Switch(PS40-2（DN25-DN100))
● Pressure Sensing Diaphragm：Brass alloy
● High - pressure Bellows：Stainless steel
● High - pressure Bellows：Silver alloy
● Housing Protection Unit：Die-cast aluminum alloy
● Sealing O - ring：Fluororubber
● Response Time：Overall trigger delay ≤ 15ms (mechanical transmission ≤ 10ms + electrical on/off ≤ 5ms)
● Pressure Cycle Life：0~1.6MPa for 500,000 cycles, contacts free of adhesion, diaphragm free of cracking
● Design Working Pressure：0 ~ 1.6MPa (basic range); customizable to extend to 0 ~ 2.5MPa
● Trigger Threshold Range：0.05 ~ 1.3MPa (basic range adjustable)
● OEM Service：Accepted
● Delivery Terms：FOB, CFR, CIF, EXW
● Payment Mode：T/T, L/C, PayPal, Western Union
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Product Details
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Product Formation
The Potter Fire Protection Pressure Switch is a core pressure monitoring and interlock control component within fire automatic control systems. Specifically designed for fire water systems, foam systems, and other fire protection scenarios, it precisely detects pressure changes to trigger alarms or activate equipment (e.g., fire pumps, alarm valves), serving as the "pressure sensing hub" ensuring the reliability of fire protection systems.
Its development process integrates century - old fire protection technology accumulation, precision manufacturing processes, and international standard certifications, encompassing functional positioning, core component design, material selection, full - process production control, and multi - dimensional performance verification. This ensures long - term stable operation even in harsh fire protection environments.
KEY WORDS： Pressure-type Water Flow Switch，Single/Dual-contact Pressure Switch，Low and High Pressure Supervisory Switch，Pressure Supervisory Switch for Overpressure Systems，China, manufacturers, suppliers, wholesale, factory.
Other Classifed Products：
Fire Hose Categories, Fire Sprinkler System, Fire Protection Valve , Fire Hose Reel&Cabinet , Fire Foam Equipment，Fire Nozzle and Fire Monitor , Fire Hydrant , UL/FM Fire Fighting Equipment , Brass Valve Categories , Fire Extinguisher Series .
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Product Features
As the "pressure sensing hub" of global fire automatic control systems, the Potter Fire Protection Pressure Switch provides stable and efficient pressure monitoring and interlock control for fire systems. Its specific features are as follows:
- Precise Pressure Sensing with Minimal Trigger Error
Repeatability ≤±0.5%FS ensures contact action is triggered by a pressure change of just 0.02MPa—delivering ultra - low threshold error for critical alarm response.
- Efficient Mechanical - Electrical Conversion
A precision gear adjustment mechanism directly drives contact action, with a mechanical transmission delay ≤10ms and electrical contact switching response ≤5ms. The total trigger delay is ≤15ms (vs. industry average ≤50ms), guaranteeing immediate activation of equipment like fire pumps and alarm valves during fires.
- Fully Sealed Protection
The housing combines die - cast aluminum alloy with standardized powder coating, paired with a fluororubber O - ring (temperature resistance: -20℃~150℃). Rated IP65, it isolates moisture, dust, and corrosive gases—eliminating the risk of internal component corrosion.
- Wide Temperature Range Operation
With an operating temperature range of -40℃~70℃, it adapts to diverse environmental demands across multiple scenarios.
- Standard Interfaces for Seamless Integration
Standardized interfaces make it compatible with various fire protection system requirements, requiring minimal modification for installation.
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Product Parameter
| Parameter Item | Value/Description | Description |
| Type | Pressure monitoring and linkage component for fire automatic control system | - |
| Core Function | Real - time monitoring of pressure in fire water supply network/pump set, triggering alarm or linkage equipment (fire pump, alarm valve) | Positioned as "pressure sensing center" |
| Design Working Pressure | 0 ~ 1.6MPa (basic range); customizable to extend to 0 ~ 2.5MPa | Cover pressure scenarios of most fire systems |
| Trigger Threshold Range | 0.05 ~ 1.3MPa (basic range adjustable) | Support scenarios such as low - pressure alarm (0.05MPa) and high - pressure protection (1.2MPa) |
| Interface Type | Bottom M20脳1.5 threaded interface (suitable for galvanized steel pipe / nylon pipe); side adjustment knob (with locking nut) | Compatible with standard fire pipeline system |
| Contact Type | Dual - contact independent output (normally open NO / normally closed NC optional) | One local alarm and one remote linkage to avoid common - cause failure |
| Pressure Sensing Unit | Diaphragm: Brass alloy (thickness 0.8mm, tensile strength ≥ 300MPa); | Nickel - phosphorus alloy plated on the diaphragm surface (thickness ≥5μm); |
| Bellows (optional for high pressure): 316L stainless steel (wall thickness 0.15mm, burst pressure ≥ 2.5MPa) | Displacement - pressure linearity≤ ± 1%FS | |
| Repeatability≤ ± 0.5%FS | ||
| Repeatability≤ ± 0.5%FS | ||
| Electrical Control Unit | Contacts: Silver alloy Circuit: | Contact capacityAC 250V/10A, DC 24V/5A |
| Built - in TVS transient suppression diode | Arc - erosion resistance≥ 100,000 times | |
| Surge voltage withstand≤ 1kV | ||
| Housing Protection Unit | Material: ADC12 die - cast aluminum alloy (surface spraying thickness ≥ 80μm); | Surge voltage withstand≤ 1kV |
| Sealing: Fluoroelastomer O - ring (Shore hardness 75±5HA) | Salt - spray resistance≥ 96h | |
| Temperature resistance- 20℃ ~ 150℃ | ||
| Adjustment Mechanism | Gear: POM engineering plastic; | Adjustment range30% - 100% of the range (for example, for 0 - 1.6MPa, it can be adjusted to 0.05 - 1.3MPa) |
| Graduation dial: 0.01MPa per grid; | Vibration drift resistance | |
| Locking: Stainless steel M3×6 screw | ||
Response Time | Overall trigger delay ≤ 15ms (mechanical transmission ≤ 10ms + electrical on/off ≤ 5ms) | Comparison with industry standards ≤ 50 ms; |
| A pressure change of 0.02 MPa will trigger it. | ||
Pressure Cycle Life | 0~1.6MPa for 500,000 cycles, contacts free of adhesion, diaphragm free of cracking | Automated pressure test bench; |
| Simulate 15 - year system operation. | ||
| Environmental Adaptability | emperature: -40°C to 70°C (Extended type: -55°C to 85°C); | High - low temperature and humidity test chamber; |
| Humidity: ≤ 95%RH (no condensation); | Vibration test bench; | |
| Humidity: ≤ 95%RH (no condensation); | No performance degradation. | |
| Sealability | Close the drain port, pressurize to 1.6MPa, hold pressure for 30s, pressure drop ≤ 0.02MPa | Hydrostatic test bench; |
| Ensure no water ingress/air leakage inside. | ||
| Sealability | Number of on/off cycles ≥ 100,000 times, contact resistance ≤ 50mΩ | Contact resistance tester; |
| Ensure stable signal transmission. | ||
| Pressure Sensing Diaphragm | Brass alloy | Corrosion - resistant and fatigue - resistant; |
| The surface is plated with nickel - phosphorus alloy to enhance corrosion resistance. | ||
| High - pressure Bellows | Stainless steel | Resistant to chloride ion corrosion; |
| No explosion risk under high - pressure scenarios. | ||
| High - pressure Bellows | Silver alloy | Arc - erosion resistant; |
| Low contact resistance ensures reliable signals. | ||
| Housing Protection Unit | Die-cast aluminum alloy | Lightweight; |
| Surface spraying enhances weather resistance. | ||
| Sealing O - ring | Fluororubber | Wide - temperature - range aging resistance; |
| Chemical - corrosion resistant. |
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FAQ
Q: Can you accept sample order?
A: Yes, we accept samples with little and reasonable charge.But need customer pay sample fees and transport fees first.
Q: What is your payment terms?
A: Payment supports T/T, L/C, etc.
Q: How can l get my order?
A: We will send you the goods by UPS,DHL,FedEx,Oversea Shipment or other forwarder, all with tracking number.
Q: Why choose us?
A： With over 15 years of experience in the fire protection industry, our company has professional technical personnel and many well-known partners in the domestic market. We offer favorable prices and guarantee quality, having passed multiple certifications!
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With more than 15 years of experience serving clients, we have developed extensive expertise and in-depth industry knowledge, enabling us to deliver reliable and effective solutions tailored to your requirements.
We provide professional technical support and customized service offerings. Our committed technical team is available to assist you with product consultation, installation guidance, and comprehensive after-sales support whenever necessary.
At Sheng Feng Fire, our professionals are dedicated to helping you select the most suitable products based on your specific needs.
Please do not hesitate to contact us for further information！
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ADDRESS
Lidong Industrial Zone, Meilin Street, Nan'an, Quanzhou City.
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EMAIL ID
sales@sfxf-china.com
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we mainly have: water system accessories, stainless steel fire boxes and foam fire hydrant box accessories, valve accessories, intelligent above-ground hydrants and intelligent end-of-line test devices and automatic fire cannons, as well as accessories and fire equipment and valve product OEM processing.