접촉기,회로 차단기,태양광 인버터,전기 계량기,태양 전지
Siemens QPL25.050B is a high-performance gas pressure switch. 다음 범위의 중압 및 저압 모니터링을 위해 설계되었습니다. 5-50 mbar, IP54 보호 등급과 기계적 수명이 특징입니다. 100,000 사이클. 연소 시스템의 안전 보호에 널리 사용됩니다.. 모델 매개변수 확인, 시스템 요구 사항과의 완벽한 호환성을 보장하기 위해 조달 중 압력 범위 및 장착 인터페이스.
- 모델 코드 정의
| 코드 세그먼트 | 의미 | 설명 |
| QPL | 제품 시리즈 코드 | Basic series of Siemens gas pressure switches for gas and air pressure monitoring |
| 25 | 구조 & rated parameters | 시리즈 25, rated current 6A AC, 정격 전압 250V AC/DC, IP54 보호 |
| 50 | Pressure adjustment range | Adjustable range: 5-50 mbar (0.5-5.0 kPa) |
| 비 | Version mark | 표준형, 자동 재설정, SPDT contact configuration |
- 핵심 사양 매개변수
| 범주 | 명세서 | 비고 |
| 기본 매개변수 | ||
| 제품 유형 | Mechanical gas pressure switch | Safety monitoring for combustion systems |
| 주문 번호. | 1117087 | Official Siemens part number |
| Adjustment Range | 5-50 mbar (0.5-5.0 kPa) | Adjustable set point |
| Max Working Pressure | 690 mbar (69 kPa) | Upper limit of continuous operating pressure |
| Switch Differential | 대략. 5-10 mbar | Pressure difference between switch-on and switch-off |
| 전기적 매개변수 | ||
| 정격전압 | AC 250V / DC 250V | 최대 작동 전압 |
| 정격전류 | AC 6A / DC 1A | 저항 부하 |
| Contact Type | SPDT | 1 평상시 열려 있음 + 1 평상시 닫혀 있음 |
| 전기 연결 | Terminal box compliant with DIN EN 175 301-803 | 수업 3 insulation protection |
| 기계 & 환경 매개변수 | ||
| Pressure Port | G1/4 internal thread (ISO228) | Center position at bottom casing |
| Measuring Port | Ø9mm, 10mm length with locking screw | For pressure calibration |
| 주변 온도 | -20°C ~ +60°C | 작동 온도 범위 |
| Medium Temperature | -40°C ~ +60°C | Applicable gas temperature |
| 보호 등급 | IP54 | 방진 및 방수 |
| Mechanical Lifespan | 100,000 사이클 | Switch actuation times |
| Applicable Media | 수업 1/2/3 gases & non-corrosive gas | Natural gas, liquefied petroleum gas, 등. |
- Full QPL25 Series Model List
| 모델 | 압력 범위 | Max Working Pressure | 비고 |
| QPL25.003B | 0.3-3 mbar | 690 mbar | Low pressure monitoring |
| QPL25.010B | 1-10 mbar | 690 mbar | Ultra-low pressure application |
| QPL25.050B | 5-50 mbar | 690 mbar | Standard medium-low pressure |
| QPL25.150B | 15-150 mbar | 690 mbar | Medium pressure monitoring |
| QPL25.500B | 100-500 mbar | 720 mbar | High pressure monitoring |
- Cross-brand Replacement Comparison
| 상표 | 모델 | 압력 범위 | 주요 차이점 | 교체 제안 |
| 지멘스 | QPL25.050B | 5-50 mbar | Original authentic product, 높은 안정성 | Priority choice |
| Honeywell | C6097A | 5-50 mbar | 저렴한 가격, similar response speed | 직접 교체 |
| 댄포스 | KPI 36 | 5-50 mbar | Different mechanical structure, high adjustment precision | Verify mounting dimensions |
| Dungs | LGW50A2 | 5-50 mbar | German brand, 믿을 수 있는 품질 | 완벽하게 호환됨 |
| Baltur | PAMPA | 5-50 mbar | Burner dedicated, 비용 효율적 | Suitable for Baltur combustion systems |
- 일반적인 문제 해결 & 유지
5.1 일반적인 결함 & 원인
| 결함 현상 | 가능한 원인 | 문제 해결 단계 |
| No switch action under normal pressure | Improper setpoint; oxidized/damaged contacts; aging/damaged diaphragm; 느슨한 배선 | Recalibrate setpoint; test contact continuity; inspect diaphragm; fasten terminals |
| No switching under abnormal pressure | Excessive switch differential; mechanical stuck; 봄의 피로 | Adjust differential; clean moving parts; replace spring assembly |
| Frequent contact ablation | 초과 적재; unstable voltage; mismatched contact material | 부하 전류를 확인하세요; install surge suppressor; replace contact assembly |
| Inaccurate pressure reading | Blocked measuring port; deformed diaphragm; calibration error | Clean port; replace diaphragm; recalibrate with standard pressure source |
5.2 유지 관리 지침
- Safety Precaution
Cut off gas supply and release pressure
Disconnect power supply
Cool down equipment to room temperature
- Calibration Procedure
① Remove protective cover and locate adjusting screw
② Connect standard pressure source and set target value
③ Clockwise rotation increases set pressure, counter-clockwise decreases
④ Test switching action and confirm accurate trigger point
⑤ Reinstall cover and ensure tight sealing
- Component Replacement
Diaphragm: Dismount with special tools, pay attention to gasket installation direction
연락하다: Replace whole switch module instead of single contact
봄: Use identical specification spare part to guarantee precision
- 응용 환경 & 산업 사례
6.1 적용 가능한 시나리오
✅ Recommended Applications
Safety monitoring for industrial & civil gas burners
Pressure protection system of gas boilers
Pressure control of natural gas pipelines
Gas supply system of industrial furnaces
Pressure monitoring for biogas power generation equipment
❌ Inadmissible Applications
High-pressure gas system over 690 mbar
Corrosive gas atmosphere
Medium temperature exceeding 60°C or below -20°C
Severe vibration and outdoor exposed installation without protection
6.2 Typical Industry Applications
| 산업 | 애플리케이션 | 기능 |
| 공조 | Commercial gas boiler | Monitor gas pressure to ensure combustion efficiency and safety |
| Food Processing | Baking furnace gas system | Avoid incomplete combustion caused by low pressure |
| 에너지 산업 | Biogas power station | Stabilize biogas pressure and protect generating units |
| 조작 | Ceramic kiln | Precise temperature control via gas pressure regulation |
| Commercial Kitchen | Large cooking equipment | Safety interlock to prevent gas leakage accidents |
- 선택 팁 & Avoidable Risks
선택 니모닉
QPL series for gas service, 25 stands for 6A rating
Last three digits define pressure range, B means standard auto-reset
050 model fits 5-50 mbar, G1/4 thread for installation
IP54 solid protection, match gas medium properly
주요 내용
- Pressure Matching
Keep actual working pressure within 20%-80% of adjustment range to maintain accuracy.
- 설치 요구 사항
Mount vertically with diaphragm downward to avoid condensed water accumulation.
Install filter at pressure port to prevent internal impurity damage.
Secure wiring firmly to avoid false triggering.
- Safety Regulations
Interlock with gas leakage alarm device.
Conduct regular inspection and calibration every 6 개월.
Perform pressure and leakage test after maintenance.
- Purchase Notice
Choose genuine Siemens products; counterfeit items have unstable quality.
Keep original package and certificate for after-sales service.
Working Principle of QPL25.050B
Core principle: Air pressure deforms diaphragm, mechanical linkage drives contact on-off to realize overpressure interlock protection
- Pressure Sensing
Gas flows into inner chamber through G1/4 port and acts on rubber diaphragm, driving axial displacement with pressure variation.
- Mechanical Force Balance
Diaphragm thrust counterbalances preset spring tension. Rotate adjusting screw to change spring preload and set trigger pressure threshold.
- Linkage Actuation
When pressure rises to set value, diaphragm overcomes spring resistance and pushes rod to drive lever mechanism. Spring rebounds when pressure drops below threshold.
- Contact Switching
Lever movement switches SPDT contacts, reverses circuit status and transmits electric signal for burner start-stop and alarm interlock.
- Differential Pressure Stabilization
Fixed pressure differential prevents frequent switching and unnecessary equipment startup/shutdown.
- 재설정 모드
Standard automatic reset; contacts recover initial state once pressure returns to normal range.
Application Scenarios of QPL25.050B
Applicable Sites
- Low pressure monitoring and protection for gas boilers and water heaters
- Supply pressure interlock control of oil and gas industrial burners
- Pressure stabilization detection for commercial kitchen stoves and hot air furnaces
- Medium-low pressure monitoring of natural gas and liquefied gas pipelines
- Safety protection for furnace and drying equipment gas supply
- Start-stop interlock for clean combustible gas such as biogas and coal gas
Forbidden Sites
- Gas pipelines with pressure higher than 690mbar
- Gas medium containing corrosion, dust and oil contaminants
- Ambient temperature below -20℃ or above 60℃
- Sites with fierce vibration and uncovered outdoor installation
