Gaoshan Valve – RH41F-25 Gas Lift Check Valve

Model Series: RH41F-25 | Pressure Class: PN25 | Connection: Flanged
RH41F-25 gas lift check valve is a one-way flow device designed for gas pipelines. The disc uses fluid differential pressure and its own weight to automatically prevent medium backflow, suitable for liquefied petroleum gas, natural gas, water and oil media, effectively protecting pipeline equipment.

✅ Core Features & Advantages

• Automatic Anti-Backflow: The disc relies on fluid pressure difference and its own gravity to open/close automatically, effectively preventing medium backflow without external power.
• Specialized for Gas Media: Designed for liquefied petroleum gas, natural gas and other gas pipelines, with good sealing performance and safety.
• Durable Material Configuration: WCB cast steel body, 2Cr13 stainless steel disc and seat, with 2Cr13/PTFE composite sealing ring for wear resistance and corrosion resistance.
• Wide Applicability: Suitable for gas, water, oil and other media, with a working temperature range up to ≤100℃.
• Simple & Reliable Structure: Lift type structure, few moving parts, stable operation and easy maintenance.
• Strict Pressure Testing: Designed and tested in accordance with PN25 pressure standards to ensure safe and reliable operation in high-pressure pipelines.

📊 Performance Specifications

Model	Nominal Pressure (MPa)	Shell Test Pressure (MPa)	Seal Test Pressure (MPa)	Working Temperature (℃)	Applicable Medium
RH41F-25	2.5	3.8	2.8	≤100	Gas, Water, 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 complete drawings for your specific model.

📝 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

⚙️ Installation & Maintenance Guidelines

• Installation Requirements: Do not let the check valve bear the weight of the pipeline; large-caliber valves need independent support to avoid pipeline stress impact.
• Flow Direction: Install the valve with the medium flow direction matching the arrow marked on the valve body.
• Mounting Configuration: Lift type check valves must be installed on horizontal pipelines to ensure the disc moves freely under gravity.
• 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 jamming.