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SPIRAX Marshall PRV DP143

Price 6000 GBP (£) / Unit

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MOQ : 1 Number

SPIRAX Marshall PRV DP143 Specification

Valve Type
Direct Acting PRV

Connection Type
Flanged Ends to BS 4504 PN16 / Screwed Ends

Features
Self Acting, Compact Design, Easy Maintenance

Valve Size
15mm (1/2) to 100mm (4)

Control System
Spring Controlled

Material
Ductile Iron / Stainless Steel / Cast Steel

Structure
Spring Loaded Pressure Reducing Valve

Application
Steam, Water and Air Pressure Regulation

Sealing
PTFE

Type
Pressure Reducing Valve

Power
Manual

Pressure
Inlet up to 17 bar, Outlet 0.2 bar to 14 bar

Media
Steam, Water, Air, Inert Gases

Port Size
15mm to 100mm

Temperature
Up to 220C

Disc
Stainless Steel

Minimum Differential Pressure
0.14 bar

Seat Leakage Class
ANSI/FCI 70-2 Class IV

End Connection Standard
Flanged (BS 4504 PN16), Screwed (BSPT to IS 554)

Trim Material
Stainless Steel 410/420

Set Pressure Range
0.2 bar to 14 bar

Body Test Pressure
25 bar g

Max Working Temperature
220°C

Model
DP143

Color/Finish
Blue Epoxy Powder Coated

Design Standard
BS EN ISO 9001

About SPIRAX Marshall PRV DP143

SPIRAX Marshall PRV DP143

Limiting Requirements: Maximum Working Condition 26 kg / cm2 at 300 C. Body configuration Conditions: 42 kg / cm2 at 427 C.

Cold Hydraulic test pressure without internals: 52 kg/cm2

Three color-coded pressure adjustment springs are available for the following downstream pressure ranges:

Yellow:02 to 3 bar

Blue:2.5 to 7 bar

Red:6.0 to 17.3 bar

Grey:16.0 to 24.4 bar

Sizes: NB 15,20, 25,40, 50 and 80.

Std. Supplements: Pr. Meter, siphon & Meter cock

Pipe Connections:Flanged to -BS10 table - 'J' * & 'K' ANSI - 300' * & '600' DIN - ND - '25' & * '40'*

Note - 80 NB has these flanges only.

How to order?

1) 20 NB SPIRAX MARSHALL DP -143FOR STEAM FLANGED TO BS 10 TABLE 'K' IBR(OR NIBR).

2) 40 NB SPIRAX MARSHALL DP 143 FOR AIR FLANGED TO ANSI 300 NIBR. Pressure Reducing Valve DP 143

Engineered for Reliable Pressure Control

The DP143 model has been meticulously crafted for optimal pressure regulation in steam, water, air, and inert gas systems. Its direct acting, spring-loaded mechanism provides quick response and stable outlet pressure, even as the inlet fluctuates. The stainless steel trim enhances durability and ensures compatibility with demanding media.

Flexible Installation and Simple Maintenance

Available in port sizes from 15mm up to 100mm, the SPIRAX Marshall PRV DP143 offers both flanged and screwed connections for installation versatility. Its compact design simplifies integration into existing systems, while the self-acting and modular trim allows for straightforward servicing and reduced downtime.

Built to Perform in Rugged Environments

With a solid body constructed from ductile iron, stainless steel, or cast steel, and a blue epoxy powder-coated finish, the DP143 is engineered for durability. Certified to BS EN ISO 9001 and designed for a maximum working temperature of 220C, this valve provides assured performance in industrial settings where reliability is paramount.

FAQ's of SPIRAX Marshall PRV DP143:

Q: How does the SPIRAX Marshall PRV DP143 regulate pressure in a system?

A: The DP143 uses a spring-loaded, direct acting mechanism. As system input pressure rises above the set point, the valve adjusts by modulating the opening to maintain the desired outlet pressure, ensuring consistent regulation for steam, water, or air applications.

Q: What are the available end connection standards for the DP143 pressure reducing valve?

A: This valve is offered with two connection types: flanged ends conforming to BS 4504 PN16 and screwed (BSPT to IS 554). This flexibility enables straightforward installation in a range of new or existing piping systems.

Q: When should the DP143 be used in an industrial process?

A: The DP143 is ideal when precise downstream pressure is required for safe and efficient operation in steam, water, and air service applications, especially where inlet pressure can vary and tight control is essential.

Q: Where can the SPIRAX Marshall PRV DP143 be installed?

A: It can be installed anywhere pressure regulation for steam, water, air, or inert gases is needed-such as boiler houses, manufacturing plants, heating systems, or utilities within residential, commercial, or industrial facilities.

Q: What benefits does the spring-controlled, self-acting design offer?

A: The self-acting, spring-controlled design ensures stable pressure reduction without the need for external power or complex controls, resulting in cost savings, reliable operation, and easier maintenance.

Q: How is maintenance performed on the DP143 valve?

A: Due to its compact, modular design and robust materials-including PTFE sealing and stainless steel internals-maintenance primarily involves periodic inspection and cleaning. Spare parts are easily accessible, minimizing system downtime.

Q: What is the process to adjust the set pressure on the DP143 valve?

A: Set pressure adjustments are made manually by turning the spring adjustment screw, allowing the operator to precisely control outlet pressure within the 0.2 bar to 14 bar range as required by the system.

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