402472 Hoffman Series 2100 Pressure Reducing Main Valve 1-1/4" NPT

(No reviews yet) Write a Review
This Item Usually Ships In 3-5 Days!
Calculated at Checkout


402472 Hoffman Series 2100 Pressure Reducing Main Valve 1-1/4" NPT. Bell & Gossett’s Hoffman Specialty Pressure Reducing Valves Series 2000. Series 2000 Pilot-Operated Regulators consist of a main valve that is controlled by a single or combination of pilot control valves. The Hoffman Specialty Series 2000 Pilot-Operated Regulator line includes over 55 main valves with 24 pilots and hundreds of possible combinations to cover a wide range of temperature, pressure and capacity options.


Operation of Series 2000 Pilot-Operated Regulator Main Valve:

The regulator main valve is held closed by the pressure on the diaphragm from an internal main spring. Pilot control valves control steam flow from the upstream supply side of the main valve to the underside of the diaphragm of the main valve. When the pilot valve opens, steam flows through the pilot and pressure builds in the signal line, applying pressure under the main valve diaphragm. This pressure force compresses the main valve spring and the main valve opens.

Under constant steam demand, the pilot and main valve remain relatively motionless. As the system approaches the pilot set point, the pilot valve begins to close. Less steam passes through the pilot and through the signal line. Pressure in the signal line decreases as steam passes through a small bleed orifice on the main valve. With lower steam pressure under the main valve diaphragm, the main valve spring forces the main valve to close.

Features of Hoffman Specialty Series 2000 Regulator Main Valves:

  • 2-ply stainless steel diaphragm provides greater accuracy of control over entire capacity range and a longer life.
  • Available in ½ through 6 inch sizes.
  • 3 interchangeable, stainless steel port and seat sizes:
    • Full for maximum capacity
    • Normal
    • Reduced for smaller load conditions
  • For continuous or dead-end service within .01% leakage of the main valve’s rated capacity.
  • Packless construction eliminates many service problems.
  • Positive travel stop and back up of diaphragm prevents over pressurizing from downstream (low-pressure) side.

If you have any questions please give us a call at 1-800-781-7405 or email us your request. Sales@NationalPumpSupply.com

View AllClose

Warranty Information

Warranty: Quoted prices include standard factory warranties. Warranty requires install, start-up and operation as per the manufacturers IOM. Job Site Assistance: By Others Start-Up: By Others Commissioning: By Others: These services, if a project requires start up, they are responsibility of contractor or commissioning agent. Owner training assistance, as outlined in any equipment specifications the responsible of the commissioning agent. Clarifications & Exclusions 'ALTERNATES' are offered for consideration and will always be subject to the engineer's and owners approval. Excludes any seismic calculations or supports, coatings other than factory standard. Terms: prices are quoted are "each" (unless stated otherwise) and FOB point of origin with no freight allowed freight ships via common ground carrier, and inside continental US Only - any special shipping requirements to be responsibility of purchaser. We offer all prices less tax, with a validity of 30 days from the date quoted and all sales are final. Once items have shipped and left the warehouse National Pump Supply is not responsible for any damage caused during the shipping process. You must contact the shipper directly and file a claim with the shipping company. Lead Time: All prices offered are based on standard factory lead times (or) as stated within quotation. Expedited shipments may be available at an additional charge. Contact your Sales Engineer for the ETA of any specific equipment on any order or quotation.
View AllClose

Additional Information

Part Number:
Connection Size:
Connection Type:
Body Material:
Cast Iron
Max Pressure psi:
250 psi
View AllClose