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Xylem Inc.

 

8200 N. Austin Avenue 

Morton Grove, Illinois 60053 

Phone: (847) 966-3700 

Fax: (847) 965-8379

www.xylem.com/bellgossett

Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries. 
© 2019 Xylem Inc.  HS-601I   June 2019   Part No. 510549

Except as otherwise required by law, Seller shall, at its option and at no cost to Buyer, either repair or replace any 

product which fails to conform with the Warranty provided Buyer gives written notice to Seller of any defects in 
material or workmanship within ten (10) days of the date when any defects or non-conformance are first manifest.  

Under either repair or replacement option, Seller shall not be obligated to remove or pay for the removal of 
the defective product or install or pay for the installation of the replaced or repaired product and Buyer shall be 

responsible for all other costs, including, but not limited to, service costs, shipping fees and expenses. Seller shall 
have sole discretion as to the method or means of repair or replacement. Buyer’s failure to comply with Seller’s 
repair or replacement directions shall terminate Seller’s obligations under this Warranty and render this Warranty 
void. Any parts repaired or replaced under the Warranty are warranted only for the balance of the warranty 
period on the parts that were repaired or replaced. The Warranty is conditioned on Buyer giving written notice 

to Seller of any defects in material or workmanship of warranted goods within ten (10) days of the date when any 

defects are first manifest.  

Seller shall have no warranty obligations to Buyer with respect to any product or parts of a product that have 

been: (a) repaired by third parties other than Seller or without Seller’s written approval; (b) subject to misuse, 
misapplication, neglect, alteration, accident, or physical damage; (c) used in a manner contrary to Seller’s 
instructions for installation, operation and maintenance; (d) damaged from ordinary wear and tear, corrosion, 
or chemical attack; (e) damaged due to abnormal conditions, vibration, failure to properly prime, or operation 
without flow; (f) damaged due to a defective power supply or improper electrical protection; or (g) damaged 
resulting from the use of accessory equipment not sold or approved by Seller. In any case of products not 
manufactured by Seller, there is no warranty from Seller; however, Seller will extend to Buyer any warranty 
received from Seller’s supplier of such products.

THE FOREGOING WARRANTY IS PROVIDED IN PLACE OF ALL OTHER EXPRESS WARRANTIES.  
ALL IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF 
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE (1) YEAR FROM 
THE DATE OF INSTALLATION OR TWO (2) YEARS FROM THE PRODUCT DATE CODE, WHICHEVER 
SHALL OCCUR FIRST.  EXCEPT AS OTHERWISE REQUIRED BY LAW, BUYER’S EXCLUSIVE REMEDY AND 
SELLER’S AGGREGATE LIABILITY FOR BREACH OF ANY OF THE FOREGOING WARRANTIES ARE LIMITED 
TO REPAIRING OR REPLACING THE PRODUCT AND SHALL IN ALL CASES BE LIMITED TO THE AMOUNT 
PAID BY THE BUYER FOR THE DEFECTIVE PRODUCT. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY 
OTHER FORM OF DAMAGES,  WHETHER DIRECT, INDIRECT, LIQUIDATED, INCIDENTAL, CONSEQUENTIAL, 
PUNITIVE, EXEMPLARY OR SPECIAL DAMAGES, INCLUDING BUT NOT LIMITED TO LOSS OF PROFIT, LOSS 
OF ANTICIPATED SAVINGS OR REVENUE, LOSS OF INCOME, LOSS OF BUSINESS, LOSS OF PRODUCTION, 
LOSS OF OPPORTUNITY OR LOSS OF REPUTATION.  

Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply 

to you. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above 
exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights 
which may vary from state to state.

To make a warranty claim, check first with the dealer from whom you purchased the product or call 

 

+1-847-966-3700 for the name and location of the nearest dealer providing warranty service.

Summary of Contents for Bell & Gossett Hoffman Specialty 2000 Series

Page 1: ...INSTRUCTION MANUAL HS 601I 510549...

Page 2: ...lots only The steam system relief valve opening set point pressure is based on the supply steam inlet pressure to the regulator and must be set as follows 12 Locate temperature regulators close to the...

Page 3: ...ee siphon loop tube petcock and pressure gauge 12 On NPT sized regulator valves install a pipe union M to allow regulator removal for service or replacement 13 Use compressed air or steam to clean pip...

Page 4: ...d directly into the heat exchanger shell 22 Install pressure relief valve V in the downstream piping as required by codes 23 Install a tee fitting W for pressure feedback line 24 Install a siphon loop...

Page 5: ...254 5 7 145 Combination 2 1 2 65 10 6 269 12 8 325 10 0 254 5 9 150 Pilots 3 80 11 2 284 13 1 333 10 0 254 6 4 162 4 100 13 0 330 13 9 353 10 0 254 7 9 200 6 150 16 6 422 14 9 378 10 0 254 9 5 241 1...

Page 6: ...n 6 Install the L fitting from the hardware kit in the tapping at the center of the main valve diaphragm cover Note For steps 7 and 8 trim the length of the copper tubing as required see Tubing Length...

Page 7: ...t 1 When only a temperature pilot is used the outlet tapping port must be reduced Use the 1 8 x 1 4 NPT bushing from the hardware kit in the 1 4 NPT outlet 2 Insert the sensing bulb so the full length...

Page 8: ...from the tank or piping without draining the system When using a dry well coat the bulb with high temperature grease or heat transfer compound to aid heat transfer Make sure that bulb and dry well ar...

Page 9: ...ediate pressures can be interpolated from the chart PNT Air Signal Maximum Steam Pressure from Main Valve Outlet Pressure AP 1A Pressure Pilot AP 4A Pressure Pilot psig Bar psig Bar psig Bar 9 0 62 0...

Page 10: ...radually compress adjusting spring by tightening adjusting nuts equally until the pilot valve opens Air Adjust Air PRV to allow pressure to build slightly until the air pilot valve opens Temperature I...

Page 11: ...making the adjustment 4 Observe the temperature while the system is running 5 Adjust the sleeve until the desired temperature is reached 6 Tighten the dial set screw without turning the adjusting sle...

Page 12: ...e Cause Low inlet pressure Solution Correct supply pressure from the boiler Fully open supply valve Check for upstream blockage Cause The regulator is not properly adjusted Solution Readjust the pilot...

Page 13: ...e air line slowly increase the air pressure on the main valve diaphragms from 0 psig to 30 psig 0 to 2 1 bar Slowly decrease the pressure back to 0 psig 0 bar Repeat this step several times 4 Check fo...

Page 14: ...Valve Seat Lapping Procedures below 9 To continue disassembly Replace plug and stem nut onto stem to prevent damage to diaphragm when air pressure is released Do not fully tighten nut Relieve air pres...

Page 15: ...necessary or replace components to stop any leaks 15 Return the main valve to service Main Valve Diaphragm Replacement A leak in the diaphragm will not allow full steam pressure to build up under the...

Page 16: ...t 7 Connect a 30 psig air supply to the 1 4 NPT pilot INLET port 8 Test for seat and disc leakage Open shut off valve from SIGNAL LINE port Apply air pressure at the INLET port Check for leakage from...

Page 17: ...ding the stem Spring Pilot Seat Lapping Operations Lap sparingly using 500 grit lapping compound and light pressure Heavy grinding may cause galling wide sealing surfaces and a grooved disc all of whi...

Page 18: ...urns 3 Back off air loading pressure 4 If used in conjunction with a temperature pilot set temperature setting higher than the bulb temperature 5 Slightly open the shut off valve in the steam supply t...

Page 19: ...If air is leaking replace the diaphragms AP 4A With a 30 psig air supply to the FEEDBACK tapping the SIGNAL line and IN tapings plugged check for air leakage from the vent hole of the pilot If air is...

Page 20: ...ble well is provided Failure to follow this procedure may result in serious burns CAUTION Temperature pilot bulb will be inserted in the heated fluid Before immersing check compatibility of copper bul...

Page 21: ...ecessary 4 Apply non hardening sealant to bottom plug 4 threads Reassemble pilot 5 Retest pilot y y y yy y yy yy yy yyy y y y yy y y y y y y yy yy yy yy yy 150 F 70 C 60 C 50 C 125 F BELLOWS HOUSING B...

Page 22: ...achieve the desired system temperature 3 Allow system temperature to stabilize at the desired set point temperature and normal load conditions Securely tighten the adjustment knob set screw 4 Rotate...

Page 23: ...lect alteration accident or physical damage c used in a manner contrary to Seller s instructions for installation operation and maintenance d damaged from ordinary wear and tear corrosion or chemical...

Page 24: ...ration and maintenance d damaged from ordinary wear and tear corrosion or chemical attack e damaged due to abnormal conditions vibration failure to properly prime or operation without flow f damaged d...

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