Armstrong MSD and SMSD Steam Distribution Assemblies place all steam supply valves in one location. Standardizing components and centralizing their location simplifies installation while providing cost savings. You also save because routine maintenance is faster. Insulation can also be provided, which can be a major savings in most installations.

All MSD and SMSD models are CE Marked according to the PED (2014/68/UE).

Features and Benefits

Cost Savings

• Reduced design specification costs
• Prefabrication vs. field assembly for easy installation
• Reduced shipping and field handling cost
• Lower long-term maintenance and operating costs
• 3-years guarantee

Design Flexibility

• Dimensional consistency
• Space savings
• Insulation package available

Options

• Top Inlet: Socketweld, Flanged DIN or ANSI, Armstrong piston valve 1-1/2" SW or Flanged
• Drain: 1/2" or 3/4" SW reducer, TCMS piston valve, TVS-4000 with 2011 steam trap (horizontal or vertical piping)
• Insulation: Armstrong Insulation Jacket (Modular or 1 piece versions). Insulation jackets could be installed without removing the handwheels.

Materials of Construction

Name	Material
Manifold Body	ASTM A105 Forged Steel
Handwheel	Ductile Iron
Bonnet	ASTM A105 Forged Steel
Spring Washer	Stainless Steel
Bolts and Nuts	Bolts: ASTM A193 grade B7 Nuts: ASTM A194 grade 2H
Piston & Stem	17% Chrome Stainless Steel
Valve Sealing Rings	Expanded Graphite & Stainless Steel
Bushing, Valve	Stainless Steel

Dimensions and Weights

Model	MSD-04	MSD-08	MSD-12	SMSD-04	SMSD-08	SMSD-12
Number of tracers	4	8	12	4	8	12
"A" Open Position (mm)	118	118	118	118	118	118
"B" Manifold Height (SW) (mm)	272	596	920	240	480	720
"C" Q to Q (mm)	162	162	162	120	120	120
"D" Drain Connection	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW
"E" Number of Holes for Mounting	2	4	6	2	4	6
"G" Inlet	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW	1-1/2" SW
"F" Outlet to tracer	1/2" & 3/4"	1/2" & 3/4"	1/2" & 3/4"	1/2" & 3/4"	1/2" & 3/4"	1/2" & 3/4"
Weight in kg (SW)	10	21	30	9	18	27

Note: Outlet to tracer available in Socketweld and Screwed NPT. Maximum Operating Pressure: 32 bar @ 400°C.

Installation

Before connecting the manifold to the system, please blowdown the line at full pressure to clear the pipes of dirt, pipe cuttings and welding beads. Possible connections: steam line - socketweld or flanged; tracers - screwed or socketweld.

Maintenance

DANGER

Equipment under pressure - Operating temperature > 100°C. Make sure manifold is cold before handling!

Valves Maintenance:

1. Make sure to interrupt steam flow up and down stream in order to isolate the manifold.
2. Using the valve's handwheels, open completely each valve.
3. Open the manifold drain valve slowly to depressurize the manifold.
4. Unscrew the bonnet nuts and leave stud in the body.
5. Pull the bonnet assembly out of valve body.
6. Remove the lower sealing rings, circular springs and sealing washer using the appropriate extractor (D115108). Check to see if all components, including valve washer at bottom of valve body have been removed. Inspect and clean any debris that might have remained in the valve body.
7. Place Armstrong part SAA1723 (stacking of seals, stem, flywheel, cap) into valve body and lightly tap it to the bottom. Screw evenly the nuts until the bonnet seats on the valve body.
8. If only the stack is damaged, replace it with article D42906.