RHPS Series BD(H)20,25 (-DP) User Manual (MS-CRD
Contents
1. is shown in sketch A 2 The pressure in the dome can also be controlled with an external pressure source The gas pressure can be taken from a cylinder or shop air mains A spring loaded pressure regulator controls the dome pressure The regulator works best with a continuous bleed on the dome This is shown in sketch B N CAUTION It is not recommended to place a gauge on the dome to check the set pressure Because of forces in the regulator the dome pressure will always be lower than the inlet pressure Place a gauge in the inlet line to check the set pressure BACK PRESSURE PILOT REGULATOR PILOT REGULATOR NEEDLE VALVE CONTINUOUS BLEED OR FIXED ORIFICE VENTING TO THE OUTLET UNE BACK PRESSURE CYLINDER OR SHOPAIR MAINS DOME REGULATOR BACK PRESSURE DOME REGULATOR sketch A sketch B External feedback N CAUTION When using the regulator with external feedback option EF make sure that the outlet pressure can be fed back to the external feedback connection before applying pressure to the regulator Failing to do so may lead to damage and non functioning of the regulator as the inlet pressure will be put straight through to the outlet The purpose of the external feedback on a pressure regulator is to get a more accurate regulation of the outlet pressure This can be achieved by sensing the outlet pressure downstream of the regulator and feeding it back to the regulator For t2. plate and valve assembly Loosen the body plug and remove the seat Inspection of disassembled parts Check all parts for abnormal wear Replace parts in case of doubt Points of attention before assembly All parts must be clean and undamaged before starting assembly Swagelok recommends replacing all o rings and the diaphragm before assembly All threaded parts must be lightly lubricated before assembly to avoid galling of threads All o rings need to be lightly lubricated to improve the lifetime of the o ring and the performance of the regulator Assembly Follow the points for disassembly in reverse order to assemble the regulator Recommended torques N CAUTION Only tighten the bolts or parts if the regulator is completely depressurized Hexagon socket head screws M12 50 N m 442 in Ib Bodyplug 50 N m 442 in Ib Dome screw DP only 30 N m 265 in Ib Testing Check the regulator for leakage across the seat with low and high inlet pressure Check the regulator for leakage across the diaphragm with low and high outlet pressure A well performing BD H 20 BD H F25 is 100 bubble tight If there is a leakage across the seat or the diaphragm the damaged parts must be replaced Troubleshooting Problem The outlet pressure creeps up without increasing the dome pressure Cause A damaged valve and or seat Solution Replace the valve and or th
3. RHPS Series OWAN BD H 20 25 DP User Manual Read the complete manual before installing and using the regulator N WARNING Before removing a regulator from the system for service you must depressurize system purge the system to remove any residual system media left in the regulator Contents lip Iren m 3 Installation EE 5 OJo aei ol a NE aa A ET EA 8 Maintenan Ce eee T r A E A T 9 Testihg iei E E iL 10 Rte rosis H r reNi 11 Introduction Representative drawing of the standard BD20 25 DP pr O 5 O O re LL QOOO NN ue SE VUA VERE AES NT i ag FLOW B s ade WEDS TT OGOGO OO OO UTS QOOL z bz z o 2 o 2 a c o z p G ke 35 2 2 o9 wn Sao S9 ELE ols alo co 0 Oo c o r io ojio NINN D e o E ojd a D E 2 Le 3 xr o T D o 7 T INL O st Y lt bx x N E o m Q o s a 2 a Sol c gt gt Oo o o E902 3 o o o m D o028 a INul Dome loading with differential pressure A differential pressure dome loaded regulator has a set spring inside the dome The set spring is used to maintain a desired pressure difference between the dome pressure and the outlet p
4. e seat Problem Leakage around the bodyplug Cause A damaged o ring or insufficient torque on the body plug Solution Replace the o ring or tighten the bodyplug according to the torque specifications Problem Leakage between the body and the dome Cause A damaged diaphragm or insufficient torque on the bolts Solution Replace the diaphragm or tighten the bolts according to the torque specifications Problem The required set pressure can not be reached Cause The inlet pressure is not high enough Solution Make sure that the inlet pressure is sufficient Problem The inlet pressure rises too much when going from a dynamic to a static situation Cause There is too much flow in the dynamic situation Solution A larger regulator is required Check the specific application data with the flow curves in our product literature if available Problem The outlet pressure does not drop if the pressure in the dome is lowered Cause The valve is sticking Solution Replace the valve assembly Problem The outlet pressure has changed without adjusting the dome pressure Cause Changes to the inlet pressure will result in changes to the outlet pressure Solution Maintain a constant inlet pressure to the regulator See section operation about dependency Problem The regulator will not relieve at the set point Cause The valve assembly is sticking or the dome pressure is accidentally adjusted Solution Replace the valve assembly or re adjust the do
5. his purpose Swagelok has provided a special connection marked on the regulator itself as external feedback Connecting the external feedback The external feedback must be installed as follows The external feedback is to be connected in a turbulence free zone in the downstream piping at a maximum distance of 5x the outside diameter of the down stream piping The external feedback must be connected on top of the downstream piping N CAUTION Never connect the external feedback line downstream of a shut off valve Principle sketch of external feedback 7 N77 T A i SHUT OFF VALVE om i 77 NE AUS 200777777 225 Or Operation Note All directions are when viewed from above Inlet and set pressure settings are obtained by adjusting pressure in the dome Increase the pressure in the dome to increase the inlet pressure Decrease the pressure in the dome to decrease the inlet pressure Icing of the regulator at high flow rates or high pressure drops may occur if the gaseous media or atmosphere contains moisture An auxiliary upstream filter is recommended for use in all but the cleanest of media If the shut off valve at the outlet side is closed after changing the set pressure the outlet pressure will rise a little because of the closing force required for bubble tight closing of the regulator This phenomenon is usually referred to as the lock up and does not indicate a proble
6. m with the regulator After flow the inlet pressure will fall a little under the set pressure This is because of the closing force required for bubble tight closing of the regulator This phenomenon is usually referred to as the reseat pressure and does not indicate a problem with the regulator An increase in the flow will result in a rise of the set pressure A decrease in the flow will result in a fall of the set pressure This is because of the force required for opening the valve of the regulator This phenomenon is usually referred to as the accumulation pressure and does not indicate a problem with the regulator An increase of the outlet pressure will result in a fall of the set pressure A decrease of the outlet pressure will result in a rise of the set pressure This phenomenon is usually referred to as the dependency and does not indicate a problem with the regulator Maintenance Required tools for maintenance a vice to fasten the regulator pincers to take out the o rings a torque wrench a torque wrench hexagon head key 10 mm a torque wrench open end insert tool 38 mm DP only amp 46 mm an open end wrench 15 mm DP only media and temperature compatible lubricant for reassembling threaded parts media and temperature compatible lubricant for o rings Snoop liquid leak detector Disassembly Loosen the hexagon socket head screws and remove the dome dome plate piston
7. me pressure 11 Warranty Information Swagelok products are backed by The Swagelok Limited Lifetime Warranty For a copy visit swagelok com or contact your authorized Swagelok representative For additional information see www swagelok com Swagelok Snoop Swagelok Company Caution Do not mix or interchange parts 2010 Swagelok Company December 2010 RO with those of other manufacturers MS CRD 0151
8. ressure Usually the dome pressure is a reference pressure taken elsewhere out of the system 2 dome 13 diaphragm plate 14 diaphragm 15 bottom springguide 20 o ring 21 o ring 24 socket head cap screw 25 ring 26 retaining ring 27 set spring 28 springguide 30 dome screw 31 setscrew Installation N WARNING When installing a Swagelok self venting regulator position the vent connection or line away from operating personnel Operating personnel must protect themselves from exposure to system fluids N CAUTION Do not use the regulator as a shutoff device N CAUTION When using the BDH20 or BDHF25 with an inlet pressure higher than 200 bar 2 902 psig a safety valve must be installed in the outlet line because the outlet pressure may not exceed 200 bar 2 902 psig Connections to System The preferred mounting position of the regulator is horizontal with the dome facing upwards If grounding is required connect a ground wire under a dome bolt Filling the dome The dome can be filled in different ways 1 This can be done by taking the gas or liquid pressure from the system and feeding this through a needle valve or fixed orifice into the dome A spring loaded back pressure regulator controls the dome pressure The outlet pressure from the pilot regulator could be vented to the atmosphere or into the outlet line This
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