RH41F-25 Gas Lift Check Valve
- Product Model: RH41F-25 Gas Lift Check Valve
- Pressure Rating: PN25 (2.5MPa)
- Connection Type: Flanged connection
- Structure: Lift type with gravity-operated disc
- Body Material: WCB cast steel
- Sealing Material: 2Cr13 stainless steel disc/seat with 2Cr13/PTFE seal ring
- Applicable Media: Gas (natural gas, LPG), water, petroleum products
- Working Temperature: ≤100℃
- Core Function: Automatically prevents medium backflow using fluid pressure difference and disc gravity
- Application Scenarios: Gas pipeline systems, liquefied petroleum gas pipelines, water and oil delivery systems
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Product Details
Gaoshan Valve — RH41F Gas Lift Check Valve
Model: RH41F-25 | Pressure: PN25 | Connection: Flanged | Medium: Gas, Water, Oil
Pressure Class
PN25 (2.5 MPa)
DN Range
DN25–DN200
Body Material
WCB Cast Steel
Max. Temperature
≤100°C
Connection
Flanged
Design Standard
GB/T 12235
Natural Gas
Liquefied Petroleum Gas (LPG)
Water
Oil
Petroleum
Liquefied Petroleum Gas (LPG)
Water
Oil
Petroleum
Core Strengths
Automatic Anti-Backflow
Disc opens and closes automatically by fluid differential pressure and gravity, effectively preventing medium backflow without external power or manual intervention.
Specialized for Gas Media
Purpose-designed for liquefied petroleum gas, natural gas, and other gas pipelines, with superior sealing performance and operational safety.
Durable Material Configuration
WCB cast steel body with 2Cr13 stainless steel disc and seat, plus 2Cr13/PTFE composite sealing ring for wear resistance and corrosion protection.
Simple & Reliable Structure
Lift-type design with minimal moving parts ensures stable long-term operation and easy maintenance with low lifecycle cost.
Wide Applicability
Suitable for gas, water, oil, and other media, covering a broad range of industrial pipeline applications with reliable performance.
Strict Pressure Testing
Designed and tested to PN25 (2.5 MPa) pressure standards with shell test at 3.8 MPa and seal test at 2.8 MPa for safe high-pressure operation.
Performance Specifications
| Model | Nominal Pressure (MPa) | Shell Test (MPa) | Seal Test (MPa) | Working Temp. (°C) | Applicable Medium |
| RH41F-25 | 2.5 | 3.8 | 2.8 | ≤100 | Gas, Water, Oil, Petroleum |
Main Component Materials
| Component | Material |
| Valve Body / Bonnet | WCB Cast Steel |
| Disc / Seat Ring | 2Cr13 Stainless Steel |
| Seal Ring | 2Cr13 / PTFE |
Main Dimensions & Weights (PN25)
| DN (mm) | Face-to-Face L (mm) | Height H (mm) | Handwheel Dia. D0 (mm) | Weight (kg) |
| 25 | 160 | 90 | 100 | 6 |
| 32 | 180 | 110 | 115 | 9 |
| 40 | 200 | 115 | 135 | 11 |
| 50 | 230 | 126 | 150 | 14 |
| 65 | 290 | 165 | 180 | 25 |
| 80 | 310 | 165 | 180 | 32 |
| 100 | 350 | 180 | 205 | 45 |
| 125 | 400 | 222 | 270 | 65 |
| 150 | 480 | 255 | 330 | 99 |
| 200 | 600 | 312 | 405 | 190 |
* Dimensions are for reference only. Contact us for detailed drawings for your specific model.
Structure Drawing
Design & Manufacturing Standards
- Design Standard: GB/T 12235
- Face-to-Face Dimensions: GB/T 12221
- Flange Standards: GB/T 9113, JB/T 79
- Testing & Inspection: GB/T 13927, JB/T 9092
- Applicable International Standards: EN 13709, EN 558 (optional)
Installation & Maintenance Guidelines
- Installation Requirements: Do not let the check valve bear pipeline weight; large-diameter valves require independent support to avoid excessive pipeline stress.
- Flow Direction: Install the valve with the medium flow direction matching the arrow marked on the valve body.
- Pipeline Orientation: Lift-type check valves must be installed on horizontal pipelines to ensure the disc moves freely under its own weight.
- Routine Maintenance: Regularly inspect the valve body, sealing surfaces, and disc for wear or damage to ensure reliable anti-backflow performance. Keep the pipeline free of debris to prevent disc jamming.
Application Fields
Gas Transmission
LNG/LPG Systems
Petroleum
Chemical Industry
Pipeline Systems
Water Supply
LNG/LPG Systems
Petroleum
Chemical Industry
Pipeline Systems
Water Supply
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Contact Gaoshan Valve today for detailed dimension sheets, CAD drawings, and customized gas pipeline solutions.
