RTJ2-*/*HL series gas pressure regulator

The HL series pressure regulator not only has stable performance, but also can be equipped with silencer to reduce noise. The valve barrel design provides a tight seal, and the sturdy construction makes the service life longer.

Applicable media

Natural gas, coal gas, liquefied petroleum gas and other non-corrosive gases.

Fabrication standard

GB27790-2020 City Gas Pressure Regulator

• Axial-flow type
• High precision
• Balance valve design
• The pressure deviation is relatively small at full load.
• The response time of the membrane under full load is very short.
• Fewer components and simple structure
• Valve position and travel indicator
• Modular design
• Easy on-line maintenance
•  

  Table of Technical Parameters

  Implementation standards	EN 334   GB27790
  Nominal pressure	CLass150~Class900(2 MPa-16 MPa)
  Nominal size	DN25 ~ DN400 (NPS1” ~ NPS 16” )
  Connection mode	ANSIB16.5 RF , RTJ Flange ANSIB16.5 RF, RTJ
  Design temperature	-29°C ~ 60°C ; -46°C ~ 60°C
  Maximum inlet pressure	10MPa (may be lower depending on flange class)
  Outlet pressure range	0.1MPa~ 8.0MPa
  Precesion Class AC	+1%(AC1), +2.5% (AC2.5), +5%(AC5 )
  Closing pressure rating SG	2.5%(SG2.5), 5%(SG5), 10% ( SG10)
  Closing pressure zone Class SZ	2.5%  5% ( SZ2.5  SZ5  )

   

• Caliber DN	Pressure Rating Flange Model		L mm	L1 mm		L2 mm		d1 mm		d2 mm		d3 mm		h mm		Ring No. R		Connecting bolt
  																		Specifications		Quantity
  DN25/1”	Class150 RF		184	2		12.7		79.4		110		330		580		-		M14		4
  	Class300 RF		197	2		15.5		88.9		125		330		580		-		M16		4
  	Class600 RF		210	7		17.5		88.9		125		330		580		-		M16		4
  	Class900 RTJ		254	6.35		28.6		101.6		150		410		660		16		M24		4
  DN50/2”	Class150 RF		254	2		17.5		120.7		150		420		670		-		M16		4
  	Class300 RF		267	2		20.4		127		165		420		670		-		M16		8
  	Class600 RF		286	7		25.4		127		165		420		670		-		M16		8
  	Class900 RTJ		368	7.92		38.1		165.1		215		505		755		24		M24		8
  DN80/3”	Class150 RF		298	2		22.3		152.4		190		510		760		-		M16		4
  	Class300 RF		317	2		27		168.3		210		510		760		-		M20		8
  	Class600 RF		337	7		31.8		168.3		210		510		760		-		M20		8
  	Class900 RTJ		381	7.92		38.1		190.5		240		600		850		31		M24		8
  DN100/4”	Class150 RF		352	2		22.3		190.5		230		580		830		-		M16		8
  	Class300 RF		368	2		30.2		200		255		580		830		-		M20		8
  	Class600 RF		394	7		38.1		215.9		275		580		830		-		M24		8
  	Class900 RTJ		457	7.92		44.5		235		290		675		925		37		M30		8
  DN150/6”	Class150 RF		451	2		23.9		241.3		280		670		920		-		M20		8
  	Class300 RF		473	2		35		269.9		320		670		920		-		M20		12
  	Class600 RF		508	7		47.7		292.1		355		670		920		-		M27		12
  	Class900 RTJ		610	7.92		55.6		317.5		380		770		1020		45		M30		12
  DN200/8”	Class150 RF		543	2		27.0		298.5		345		780		1030		-		M20		8
  	Class300 RF		568	2		39.7		330.2		380		780		1030		-		M24		12
  	Class600 RF		610	7		55.6		349.2		420		780		1030		-		M30		12
  	Class900 RTJ		737	7.92		63.5		393.7		470		850		1100		49		M36*3		12
  DN250/10”	Class150 RF		673	2		28.6		362		405		840		1090		-		M24		12
  	Class300 RF		708	2		46.1		387.4		445		840		1090		-		M27		16
  	Class600 RF		752	7		63.5		431.8		510		840		1090		-		M33		16
  	Class900 RTJ		838	7.92		69.9		469.9		545		940		1190		53		M36*3		16
  DN300/12”	Class150 RF		737	2		30.2		431.8		485		920		1170		-		M24		12
  	Class300 RF		775	2		49.3		450.8		520		920		1170		-		M30		16
  	Class600 RF		819	7		66.7		489		560		920		1170		-		M33		20
  	Class900 RTJ		968	7.92		79.4		533.4		610		1030		1280		57		M36*3		20
  DN400/16”	Class150 RF	986			2		35		539.8		595		920		1250		-		M27		16
  	Class300 RF	1000			2		55.6		571.5		650		920		1250		-		M33		20
  	Class600 RF	1100			7		76.2		603.2		685		920		1250		-		M39*3		20
  	Class900 RTJ	1210			7.92		88.9		616		705		1030		1370		57		M42*3		20

   

• Inlet pressure  (MPa)	Outlet pressure  (MPa)	Specifications and models
  		DN50	DN80	DN100	DN150	DN200
  0.2	0.05-0.1	1675	2089	2596	4670	6050
  0.4	0.05	2041	2890	4070	7482	9792
  	0.1	1815	2420	3630	6155	8450
  	0.2	1465	2265	3085	5100	7260
  	0.3	1240	1975	2530	4330	6270
  0.8	0.1	2900	3360	7810	11100	14880
  	0.2	2671	3150	6670	10030	13800
  	0.4	2590	2952	5760	9540	11820
  	0.6	2450	2790	5250	9072	10740
  1.0	0.1	4840	5400	11300	17680	24180
  	0.3	4390	5012	10600	16250	21700
  	0.5	4299	4640	9980	14560	20280
  	0.7	3968	4100	9435	13650	15400
  1.6	0.2	6800	9420	13970	21980	27720
  	0.4	6090	8369	12540	20860	26180
  	0.8	5680	7510	11690	19882	25056
  	1.0	5110	6810	10942	19180	23935
  2.5	0.3	9450	11770	17250	27900	36900
  	0.7	8790	10470	16435	26700	34220
  	1.6	7900	9420	15179	25220	31810
  4.0	0.2-1.8	12400	30400	43200	85600	96000
  	1.0	12000	29000	42000	84000	93000
  	1.6	11800	28000	40800	82000	90000
  	2.5	11600	27000	39600	80000	88000

rtj2-*/*hl series gas pressure regulator adjustment

Adjusting an RTJ2-*/*HL series gas pressure regulator requires a clear understanding of its control mechanism, system requirements, and safety procedures. These regulators are typically used in natural gas, LPG, or industrial gas distribution systems where stable downstream pressure is essential. Because improper adjustment can cause overpressure, system instability, or equipment damage, the process should always be carried out by trained personnel following the manufacturer’s technical guidelines.

Before any adjustment is made, the system must be stabilized and depressurized as needed. Ensure that upstream shutoff valves are accessible and that the regulator is installed correctly with proper flow direction and filtration. Contaminants such as dirt or oil can significantly affect regulator performance, so system cleanliness is an important prerequisite. Inspect the vent, diaphragm, and sensing lines to make sure they are unobstructed and properly connected.

To adjust the outlet pressure, locate the adjustment screw or spring-loading mechanism, which is usually positioned under a protective cap at the top of the regulator. Turning the adjustment screw clockwise increases the outlet pressure, while turning it counterclockwise decreases it. Adjustments should be performed gradually: change the setting in small increments, allow the system to stabilize, and then read the downstream pressure gauge. Rapid or excessive adjustments may cause overshoot or excessive hunting. For HL-type high and low pressure ranges, ensure the adjustment spring corresponds to the required setpoint, as using an improper spring can lead to inconsistent control.

During regulation, observe the system for any signs of instability such as vibration, pulsation, or continuous venting. These symptoms may indicate improper sizing, a damaged diaphragm, or restrictions in upstream piping. If the regulator fails to maintain pressure after adjustment, further inspection or replacement of internal components may be necessary.

Once the desired pressure is achieved, tighten the locknut or replace the protective cap to secure the setting. Conduct a leak test on all connections and check that the regulator responds correctly to both normal and maximum flow conditions. Finally, record the adjustment data in maintenance logs for compliance and future reference.

In summary, adjusting the RTJ2-*/*HL series regulator requires careful, incremental tuning and strict adherence to safety practices to ensure stable and reliable gas pressure control.

rtj2-*/*hl series gas pressure regulator troubleshooting

Troubleshooting an RTJ2-*/*HL series gas pressure regulator requires a systematic approach to identify and resolve common issues such as pressure instability, failure to open or close properly, or unusual noise. These regulators are critical for maintaining consistent downstream pressure in gas systems, so problems must be addressed promptly and safely.

The first step is safety isolation. Before inspecting the regulator, shut off the upstream gas supply and relieve system pressure to prevent accidents. Ensure proper ventilation, especially when working with flammable gases. Once the system is safe, a visual inspection can reveal obvious issues such as damaged diaphragms, bent or corroded springs, blocked vents, or loose fittings. Dirt, debris, or moisture in the gas line is a frequent cause of regulator malfunction, particularly in industrial or high-flow installations.

Next, check the pressure settings and adjustment mechanism. If the downstream pressure is too high or too low, the adjustment spring may be improperly set, damaged, or the locknut may have slipped. Gradually adjusting the screw while monitoring a calibrated pressure gauge helps determine if the regulator responds correctly. Failure to respond usually indicates internal blockage, worn seats, or diaphragm damage.

Other common issues include fluttering or hunting—rapid pressure fluctuations—which can result from excessive upstream pressure, flow turbulence, or a mismatched regulator size. Inspect the inlet and outlet piping to ensure there are no restrictions, sharp bends, or undersized connections that could destabilize flow. Additionally, ensure the vent line is clear; a blocked vent can prevent the diaphragm from moving freely.

For persistent problems, internal components such as the valve seat, diaphragm, or spring may need replacement. Only use manufacturer-approved parts to maintain proper performance and safety certifications. After any repair or adjustment, perform a leak test and operational check to confirm that the regulator maintains stable pressure across both normal and maximum flow conditions.

In summary, troubleshooting the RTJ2-*/*HL series involves safety precautions, visual and functional inspections, careful adjustment, and, if needed, replacement of worn internal parts to restore reliable and stable gas pressure control.

rtj2-*/*hl series gas pressure regulator troubleshooting

Troubleshooting an RTJ2-*/*HL series gas pressure regulator requires careful, step-by-step analysis to ensure safe and reliable operation. These regulators are designed to maintain stable downstream gas pressure, and issues such as pressure fluctuations, failure to regulate, or unusual noises can indicate underlying problems.

The first step is safety isolation. Shut off the upstream gas supply and depressurize the system to prevent accidents. Proper ventilation is essential when dealing with flammable gases. Begin with a visual inspection: check for damaged diaphragms, bent springs, corroded components, loose fittings, or debris around the inlet and outlet. Dirt or moisture in the gas can block the valve or diaphragm movement, leading to improper regulation.

Next, examine the pressure adjustment mechanism. If the downstream pressure is too high or too low, the adjustment spring may be worn, incorrectly set, or the locknut may have slipped. Adjust the screw slowly while monitoring a calibrated pressure gauge to observe the regulator’s response. Lack of response often points to internal blockages, worn seats, or diaphragm damage.

Pressure instability or fluttering can be caused by turbulence, excessive upstream pressure, or incorrect regulator sizing. Check the inlet and outlet piping for sharp bends, restrictions, or undersized sections that may disrupt flow. Also, ensure the vent is unobstructed, as a blocked vent can prevent proper diaphragm movement.

For persistent issues, internal components such as the valve seat, diaphragm, or spring may need replacement with manufacturer-approved parts. After repairs, perform a leak test and operational check under normal and maximum flow conditions to confirm proper function.

In summary, troubleshooting the RTJ2-*/*HL regulator involves safety isolation, inspection of external and internal components, careful adjustment, and verification through testing to restore reliable and stable gas pressure control.