Armstrong IS-4BD universal stainless steel connector allows you to install a 4-bolt compatible steam trap to fit most piping configurations and applications. The IS-4 series combines the integrity of an all-welded installation with the versatility of a quick-change steam trap replacement. The IS-4BD model specifically includes a Class 800 forged steel gate valve for blowdown service.

The connector works with Armstrong Intelligent Monitoring (AIM™) to bring intelligence to wireless technology by applying smart devices to monitor critical plant applications in real time.

Features

• Class 900 design
• All stainless steel construction
• Integral strainer
• Exceptional corrosion resistance
• Recessed gasket surface
• Three-year guarantee against defects in materials and workmanship (connector only)

Maximum Operating Conditions

Maximum allowable pressure (connector design):

• IS-4: 1,245 psig @ 900°F (85.8 barg @ 482°C)
• IS-4BD: 1,100 psig @ 800°F (75.8 barg @ 426°C)

Materials and Weights

Component	Material
Body	ASTM A351 Gr. CF8M
Screen	Stainless steel
Screen retainer	ASTM A351 Gr. CF8M
Retainer bolts	ASTM A193 Gr. B16

Weights:

• IS-4: 4.75 lbs (2.15 kg)
• IS-4BD: 9.9 lbs (4.5 kg)

Compatible 4-Bolt Steam Traps

• SH4000 Series
• IB4022
• CD4080
• IB4011
• ID4500

How to Order

Model	Connection Size/Type	Flanges	Flow Direction	Inlet Configuration	Outlet Configuration
IS-4 or IS-4BD	3NPT = 3/4" (20) NPTF 3SW = 3/4" (20) Socketweld 3FL = 3/4" (20) Flanged 4NPT = 1" (25) NPTF 4SW = 1" (25) Socketweld 4FL = 1" (25) Flanged	Class 600 Class 900	R = Right to Left L = Left to Right	None SB = Single Block DBB = Double Block & Bleed	None SB = Single Block DBB = Double Block & Bleed

Notes

1. IS-4BD includes Class 800 forged steel gate valve for blowdown service.
2. Connection Size/Type based on the system condensate supply and return requirements.
3. All connections for SB or DBB will be socketweld.
4. Flanges available in Class 600 and 900.
5. For Block & Bleed dimensions: Consult Factory.