Pilot-Operated Regulating Valves - Watson McDaniel

HD Pilot-Operated Regulating ATUREPilotLiquid MPERATUREPilotVapor TensionPDPDIFFERENTIALPRESSUREPilotThe HD Series Pilot-Operated Regulating Valve was designed for extremely accurate control of temperature and pressurein steam service applications. The HD-Series is made of Ductile Iron for extended pressure and temperature ratings whencompared to cast iron. Several different control pilots can be mounted to the valve to control pressure, temperature, or acombination of both. When two or more pilots are used together (both a pressure and a temperature pilot) an additional pilotadapter for the second pilot is required (must indicate when ordering). The most common pilots are the PP-Pilot for pressurereducing, and the PT-Pilot for temperature control. The Standard Main Valve is used for an inlet steam pressure range of15 - 300 PSI. The Low-pressure Main Valve contains a different main valve spring and is available for an inlet pressurerange of 5 - 20 PSI. The Main Valve and Pilot are purchased separately.Pressure ControlBack PressureWhen controlling pressure, there are several options you canuse for a pilot. The PP-Pilot and the PP5-Pilot are both springadjusted pressure pilots. The PP-Pilot is used on general-purposepressure reducing applications and the PP5-Pilot is used whenhigher accuracy is required. The PA-Pilot is air controlled andallows for easier and remote adjustment of steam pressure.When controlling the back pressure in a steam system, theBP-Pilot is used in conjunction with the HD-Series Regulator.This controls the pressure on the upstream side of the regulator.Temperature ControlSeveral choices of pilot valves can be used for temperature controlwhen steam is used on heating applications. The PT style pilot(most common) is referred to as a “solid liquid fill” and containsa temperature probe connected by a length of capillary tubing toa bellows in the pilot valve. When the temperature bulb is heatedthe liquid inside the probe expands the bellows and closes off thepilot valve. PTRP pilot operates in a similar fashion except thisstyle is referred to as a vapor tension unit.The PTL temperature controller uses a bi-metal element to sensetemperature and deliver an appropriate air signal to a PA air pilotthat controls the operation of the HD main valve.Temperature-Pressure ControlThe PP & PT-Pilot combination is used when it is desirable tocontrol both the pressure and temperature of a system with onlyone regulating valve. The unique features of this modular valveallow this to be accomplished quite easily. When the PP & PT-Pilotcombination is used, the downstream pressure is limited to amaximum setting by the pressure pilot, while the temperature pilotmaintains the correct temperature.On-Off OperationElectrical On-off control of the regulator is possible by using thePS-Solenoid Pilot. The PS-Pilot allows the regulator to be shut offor turned on electrically. Normally the regulator is equipped witheither a PP-Pressure Pilot or PT-Temperature Pilot in addition tothe PS-Solenoid Pilot.REGULATORSTypical ConfigurationsPilot-OperatedPP & PP5PRESSUREPilotSpring-LoadedDifferential PressureThe PDP-Pilot is used when trying to balance two different mediasources that are being blended.Stainless Diaphragm OptionThe HD regulator is supplied standard with a high tensile strengthPhosphor Bronze diaphragm which has been determined thruexperience and testing to be the absolute best diaphragm materialchoice for steam applications. Stainless Steel diaphragms areoffered as an option because certain industry specifications havebeen written requiring stainless steel. Note: Stainless steel is proneto work hardening and will not last as long as phosphor bronze;only use if required by the specification to do so.Stainless Tubing OptionCopper tubing is supplied as standard. Copper tubing offersexcellent corrosion resistance and is easy to bend and manipulateand normally outlasts the life span of the valve. Stainless Steeltubing is offered as an option.Reduced port trim Option:Regulators should be sized to meet the application not to fit the pipesize. Over sizing a regulator may cause overshoot which leads toerratic pressure or temperature control often referred to as “hunting.”A valve with reduced port trim has a reduced seat and disc size fora given pipe size, (refer to capacity charts).Low pressure (differential and inlet) Option:Regulators require a minimum Inlet pressure as well as a minimumpressure drop across the valve to operate properly. The HDStandard Main valve requires a minimum inlet pressure of 15 PSIGand minimum differential pressure of 10 PSI. The Low PressureMain valve requires 5 PSIG minimum inlet pressure and 3 PSIminimum differential pressure. Low pressure main valve uses aEPDM diaphragm.Tel: 610-495-5131 Pottstown PA USA www.watsonmcdaniel.com205

HD Pilot-Operated Regulating ValveHD Regulator & Pilot CombinationsHD Main ValvewithPP-Pressure PilotSpring-LoadedREGULATORSPilot-OperatedShown with PP Pressure control Pilot. Spring-loaded pressure pilots are the mosttypical method of controlling downstream pressure in Steam Systems. Adjustmentscrew on top of pilot controls downstream steam pressure.HD Main ValvewithPT-Temperature PilotShown with Temperature control Pilot: The PT Temperature Pilot will control the flowof steam flowing through the HD valve based on the temperature of the sensing bulb.The liquid-filled sensing Bulb is available in standard 8 ft and 15 ft capillary lengths.Other lengths available.HD Main ValvewithPA-Pressure PilotAir-LoadedShown with Air-loaded pressure control pilot. Air-loaded pressure pilots are used toreduce and control pressure in steam systems. They are used as an alternative to themore common spring-loaded pilot. The PA Air-loaded pressure pilot allows for remoteadjustment of the valve using a small air regulator to alter the air pressure to the topof the pilot.HD Main ValvewithPS On/Off ControlSolenoid Pilot206Shown with PS ON-OFF(solenoid Pilot) control pilot: The PS ON-OFF (solenoid) Pilotallows for the HD valve to be opened and closed using an electrical switch to activatea small solenoid valve. The PS Pilot can be used for system automation or as a safetyshut down device. The ON-OFF pilot is most often used in conjunction with a Pressureor Temperature control pilot.www.watsonmcdaniel.com Pottstown PA USA Tel: 610-495-5131

HD Pilot-Operated Regulating ValveHD Regulator & Pilot CombinationsHD Main Valvewith PT-Temperature Pilot PP-Pressure PilotThe PT Temperature Pilot will maintain the proper flow of steam through the mainvalve to keep the process it’s controlling at the proper temperature. The PP pressurePilot will LIMIT the downstream pressure to a maximum value. This combination ofPilots is very convenient when the Steam Pressure in the supply line is greater thanthe maximum pressure allowed to the process heat exchanger. This eliminates usinga separate Pressure reducing valve prior to the temperature control valve.REGULATORSHD Main ValvePilot-OperatedNOTE: When two or more pilots are used on the same valve: An additional Pilot Adapterfor Second Pilot is required: Use part number: BADAPTERwith PP-Pressure Pilot PS1 On/Off ControlSolenoid PilotThe PP Pressure Pilot will maintain the desired downstream set pressure as long asthe PS ON-OFF (solenoid) Pilot is in the ON position. Available in either Normally-ONor Normally-OFF configuration; an electrical signal turns valve OFF or ON.HD Main Valvewith PT-Temperature Pilot PS1 On/Off ControlSolenoid PilotThe PT Temperature Pilot will maintain the proper flow of steam through the mainvalve to keep the process it’s controlling at the proper temperature as long as thePS ON-OFF (solenoid) Pilot is in the ON position. Available in either Normally-ONor Normally-OFF configuration; an electrical signal turns valve OFF or ON.HD Main Valvewith PP-Pressure Pilot PT-Temperature Pilot PS1 On/Off ControlSolenoid PilotThe PT Temperature Pilot will maintain the proper flow of steam through the mainvalve to keep the process it’s controlling at the proper temperature as long as thePS ON-OFF (solenoid) Pilot is in the ON position. The PP Pressure Pilot will LIMITthe downstream pressure to a maximum value.NOTE: When two or more pilots are used on the same valve: An additional Pilot Adapterfor Second Pilot is required: Use part number: BADAPTERTel: 610-495-5131 Pottstown PA USA www.watsonmcdaniel.com207

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RegulatorsPilot-Operated Regulating ValvesHD SeriesHD Main Valve Ductile IronAFLGHD-Series 1/261/2783/483/4107/8113/4131/4143/4193/4Weight (lbs)NPT 150# 70REGULATORSB(A) Face-To-FaceNPT 150# 1010103/4117/8 ”11/2”2”21/2”3”4”6”– inchesOption: Stainless diaphragms and external tubing - consult factoryStandard pilot mounting is on the right side of the regulator when looking into the outletport (as shown). Pilot mounting on HD regulators are field-reversible.DM AT E R I A L SBodyCoverGasketCover ScrewsPilot AdapterScreenTubingValve SeatValve DiscDiaphragmOPERATING PRESSURESInlet Pressure Range: (for Main Valve):15 PSIG (Standard Main Valve)5 PSIG (Low-Pressure Main Valve)Minimum Differential Pressure (for Main Valve):*10 PSI (Standard Main Valve)3 PSI (Low-Pressure Main Valve)* Not required for Temperature Pilot applicationsDuctile IronDuctile IronGrafoil/GarlockSteelDuctile Iron/Cast SteelStainless SteelCopperHardened SST (55Rc)Hardened SST (55Rc)Phosphor Bronze (standard)EPDM (Low Pressure Main Valve)Ordering Instructions: HD Series Regulator with a PilotModel Code for Main Valve:Model Code for Pilot:HD-19-F150PP-BHD Valve with Pressure PilotHD Series Valve with 3” 150# FlangesPressure Pilot, 20-100 PSIG (Blue spring color)HD Valve with Temperature PilotHD Valve with Pressure & Temperature Pilots* If 2 Pilots areused on thesame valve,a SecondaryPilot Adapteris required.Model Code for Main Valve: HD-17-F150(2” HD Series Valve with 150# Flanges)Model Code for Pilot: PP-B(Pressure Pilot with 20-100 PSIG Range)Model Code for Main Valve: HD-17-F150(2” HD Series Valve with 150# Flanges)Model Code for Pilot: PTU-14-8(Temperature Pilot (100-160 F) with 8 Ft. Capillary)Model Code for Main Valve: HD-17-F150(2” HD Series Valve with 150# Flanges)Model Code for Pilot: PP-B(Pressure Pilot with 20-100 PSIG Range)Model Code for Pilot: PTU-14-8(Temperature Pilot (100-160 F) with 8 Ft. Capillary)Model Code for Secondary Pilot Adapter*: BADAPTERTel: 610-495-5131 Pottstown PA USA www.watsonmcdaniel.com209

RegulatorsPilots for HD Regulating ValvesPP & PP5 PilotsHD SeriesPressure Regulating with PP & PP5 Spring-loaded PilotPressure Pilot(Standard: 1.0 psig accuracy)(High-accuracy: 0.5 psig accuracy)Pilot Body MaterialMax Inlet PressureReduced Outlet Pressure RangePPPP5Cast Steel300 PSIG3-200 PSIGInlet Pressure Range15-300 PSIG5-20 PSIG(with HD Standard main valve)(with HD Low-Pressure (LP) main valve)REGULATORSPilot-OperatedMinimum Differential Pressure10 PSI3 PSI(with HD Standard main valve)(with HD Low-Pressure (LP) main valve)Typical ApplicationsOptionsThe PP & PP5 Pressure Pilots are used with the HD Regulator tocontrol steam pressure in steam mains or for process equipment.Pilot-operated regulators maintain constant downstream pressureeven when the inlet pressure to the valve fluctuates or steam usagevaries. The PP-Pressure Pilot is adequate for controlling pressurein most industrial applications. For increased accuracy use thePP5 Pilot. Pressure pilot can be used with temperature pilot to eliminatethe need for two separate regulators Solenoid pilot can be added for remote on/off control of regulatorExample: PP-B Pilot at 20-100 PSIGReduced Pressure RangePSIPP-Pressure Pilot (Standard) 1.0 PSIG accuracyPP5-Pressure Pilot (Special Applications) 0.5 PSIG accuracyModelCodeSpringColorWeightlbsPP-Pressure Pilot (for Standard Industrial Applications) 1.0 PSIG accuracyFeatures3-2520-10080-200 The PP-Pilot can maintain downstream pressure to 1 PSIG PP5-Pilot can maintain downstream pressure to 0.5 PSIG Choices of three overlapping pressure ranges Pilot is easily installed on pilot adapter using four bolts,PP-YPP-BPP-RYellowBlueRed101010PP5-Pressure Pilot (Special Applications) 0.5 PSIG accuracy1-1010-25no tubing connections are required Full port strainer and blowdown valve on pilot adapter forprotection of pilot from dirt and scale Solid floating diaphragm is more failure resistant Watson McDaniel's pilots can be used with othermanufacturers’ regulatorsPP5-Y*PP5-B*YellowBlue2525* A Spacer (model # BAP-SPACE) is required when using PP5 Pressure Pilotson a 3” & 4” HD Main Valve.Units: inchesHD Main ValvewithPP-Pressure PilotMATERIALS for PP Pressure PilotPP Pilot BodyPP5 Pilot BodyHead & Seat GasketDiaphragmHead & Seat AssemblyMATERIALS for HD Main ValveModel Code for Main Valve: HD-17-F150(2” HD Series Valve with 150# Flanges)Model Code for Pilot: PP-B(Pressure Pilot with 20-100 PSIG Range)210BodyCoverGasketCover ScrewsPilot AdapterScreenTubingValve SeatValve DiscDiaphragmPressureAdjustingScrewWCb 216 Cast SteelCast Iron302 SSPhosphor BronzeHardened SST (55 Rc)Ductile IronDuctile IronGrafoil/GarlockSteelDuctile Iron/Cast SteelStainless SteelCopperHardened SST (55 Rc)Hardened SST (55 Rc)Phosphor Bronzewww.watsonmcdaniel.com Pottstown PA USA Tel: 4” NPT91/25812“PP”“PP5”

RegulatorsPilots for HD Regulating ValvesPP & PP5 PilotsHD SeriesPressure Regulating with PP & PP5 Spring-loaded PilotReducing ureThe PP-Pilot and the PP5-Pilot are both spring-adjustedpressure pilots. The PP-Pilot is used on typical generalpurpose pressure reducing applications. The PP5-Pilot isused when higher accuracy is required and is capable ofmaintaining a control pressure window of less than 1 agmDownstream PressureSensing LinePressure AdjustmentSpringPilotDiaphragmPilot ValveOpenPilot ValveClosedPilot ValvePilot-OperatedPressure urePressureOpensMain ValveHigh-Pressure steam pushes updiaphragm & opens valveDiaphragmWhen pilot valveopens, steam flows tounderside ofdiaphragmPilot valve opens and closesdepending on downsteam pressure(shown open)How it WorksThe Pressure Pilot controls the operation of the HD Regulator. The sensing line connects the pressure pilot to the downstream sideof the regulator. Pressure in the sensing line applies an upward force to the pilot diaphragm to compress the adjustment spring.When system pressure equals set point, the diaphragm moves upwards against the force of the adjusting spring, closing pilot valve.When the pilot valve is shut, steam cannot pass thru to the underside of the regulator diaphragm, closing the regulator. Whenthe steam pressure falls below its set point, the pilot valve opens allowing steam to lift the main valve diaphragm which opensup the regulating valve.D I M E N S I O N S H D - S e r i e s – inchesStandard PP-Pilot 5”PP5-Pilot ��2”21/2”3”4”6”Face-To-FaceNPT 150# 1010103/4117/8 T181823434365-(lbs)FLG356085105145235470For sizes 1/2” to 11/2” add 21/2” to “C” dimension;For sizes 2” to 6” add 5” to “C” dimension.** Add 11/2” to “E” dimension for all sizes.For PP5 Pilot: *EDTel: 610-495-5131 Pottstown PA USA www.watsonmcdaniel.com211

RegulatorsPilots for HD Regulating ValvesPBP PilotsHD SeriesBack Pressure Regulating with PBP Back-Pressure PilotBack Pressure PilotPilot Body MaterialMax Inlet PressurePBPDuctile Iron300 PSIGReduced Outlet Pressure Range10-200 PSIGInlet Pressure Range15-300 PSIGREGULATORSPilot-Operated(when used with HD Standard main valve)Inlet Pressure Range5-20 PSIG(when used with HD-LP Low-Pressure main valve)Minimum Differential Pressure:10 PSI (Standard Main Valve)3 PSI (Low Pressure Main Valve)Typical ApplicationsThe PBP-Back Pressure Pilot, used with the HD regulator,maintains upstream pressure in steam systems. These regulatorsare commonly used to supply flash steam to low pressure mains.Features The PBP-Pilot can maintain upstream pressure to 1 PSIG Choices of three overlapping pressure ranges Pilot is easily installed using four bolts. No tubingReduced Pressure 0-200PBP-YPBP-BPBP-RYellowBlueRed101010connection required Full port strainer and blowdown valve on pilot adapter forprotection of pilot from dirt and scale Solid floating (no penetration hole) pilot diaphragmresists failure Watson McDaniel's pilots can be used with otherPressureAdjustingScrewmanufacturers’ regulatorsOption Can be used with solenoid pilot for on/off control9.5”O P E R AT I N G P R E S S U R E SInlet Pressure Range:15-300 PSIG (Standard Main Valve)5-20 PSIG (Low Pressure Main Valve)Steam SensingLine Connection1/4” NPTMinimum Differential Pressure:10 PSI (Standard Main Valve)3 PSI (Low Pressure Main Valve)5.0”212www.watsonmcdaniel.com Pottstown PA USA Tel: 610-495-5131

RegulatorsPilots for HD Regulating ValvesPBP PilotsHD SeriesBack Pressure Regulating with PBP Back-Pressure Pilotconstantback pressuresteaminletsteamoutletREGULATORSDIMENSIONS �21/2”3”4”6”CBFace-To-FaceNPT 150# 1010103/4117/8 121/2151/816Pilot-OperatedThe PBP Back-Pressure Pilots areused with HD Regulators to maintainupstream pressures in steam systems.When the upstream pressure reachesthe pilot set point, the regulator opens.The HD Regulator with a PBP BackPressure Pilot is commonly used tosupply steam to low-pressure mains.The PBP Back-Pressure Pilot maintainsa constant back-pressure on the inletside of the regulator. Should not beused in place of a safety relief valve.HDMainValvePBPPressurePilotBack Pressure– inchesWeight FLG356085105145235470EDHD Main ValvewithMATERIALS for PBP Back-Pressure PilotPilot Body & CoverHead & Seat GasketDiaphragmHead & Seat AssemblyPBP-Pressure PilotCast Steel302 SSPhosphor BronzeHardened SST (55 Rc)MATERIALS for HD Main ValveBodyCoverGasketCover ScrewsPilot Adapter

The Watson McDaniel HSP Pilot-Operated Pressure Regulating Valve is constructed of Cast Carbon Steel for higher pressure and temperature ratings when compared to ductile iron. HD Series Pilot-Operated Regulating Valves -Introduction 202-207 Main Valve for HD Regulators Ductile Iron 208-209 Pilots for HD Regulators 210-230