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Cast iron wafer double disc check valve, 3 inch, flanged wafer connections, Buna-N seals, 316 stainless steel spring

Mueller Steam Specialty

Mueller Steam Specialty 71AHB3H 3 inch cast iron wafer double disc check valve

SKU CH-2SXC-V4FR8

A 3-inch cast iron wafer double disc check valve for process piping, rated 200 psi at 150 °F with Buna-N seals and a 316 stainless steel spring

  • Reliable backflow prevention with double-disc wafer design
  • Durable cast iron body handles 200 psi at 150 °F
  • Buna-N seals rated to 100 °F for tight shutoff
  • 316 stainless steel spring resists corrosion in process piping
  • Installs horizontally or vertically between flanged wafer connections

3-inch Cast Iron Wafer Check Valve

The Mueller Steam Specialty 71AHB3H is a wafer-style double disc check valve designed for process piping systems. It fits 3-inch flanged wafer connections and installs in either horizontal or vertical orientations. The cast iron body provides structural strength for industrial water lines.

Buna-N Seals and 316 Stainless Steel Spring

The valve uses Buna-N for both the seal and seat material, offering compatibility with standard water service up to the rated limits. A 316 stainless steel spring ensures consistent disc return and resists corrosion in wet environments. These materials define the fluid compatibility and temperature ceiling.

200 psi at 150 Degrees F Water Rating

The maximum water pressure rating is 200 psi at 150 degrees F, while the maximum temperature limit is 100 degrees F. Steam service is not rated, so the valve must not be used in steam lines. Select this part only when system conditions stay within these pressure and temperature boundaries.

How it compares

Measured against everything we stock in Faucet Valves & Replacement Parts, at today’s prices. Recalculated every night.

Price $372.99
Pricier than about 90% of the 1,132 comparable items (median $54.99).

Specifications

Product
Brand nameMUELLER STEAM SPECIALTY
Product typeOther

Questions about this item

How often should the Buna-N seals and 316 stainless steel spring be inspected or replaced in a process piping system?

Inspect Buna-N seals and the 316 stainless steel spring during scheduled shutdowns; replace if wear, cracking or loss of tension is found.

What pressure and temperature combination defines the operating ceiling for this 3-inch cast iron wafer check valve?

The valve is rated for 200 psi at 150 degrees F water; steam service is not rated.

How much heat does the valve body radiate when water at 150 degrees F flows continuously through the 3-inch wafer?

The cast iron body will reach fluid temperature, so external surfaces radiate heat consistent with 150 degrees F water inside.

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