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Single End Shut Off Steel Coupler with Metal Thread – PM Series Plug

The Single End Shut Off Steel Coupler (PM Series) is a high-performance hose plug engineered for marine applications where safe and reliable fluid transfer is critical. As part of the IMPA 35 apparatus, this metal-thread coupler plug delivers a tight connection for fuel, lubricating oil, water, and compressed air lines aboard vessels.

Constructed from robust steel with precision-formed threads, the PM Series plug is built to withstand high operating pressures and the corrosive atmosphere of saltwater environments. Its single end shut-off design automatically cuts off flow upon disconnection, minimizing spills and enhancing crew safety. The coupler's quick-connect action simplifies hose handling during bunkering, cooling water, and deck service operations.

Whether used in engine rooms, cargo handling, or general maintenance, this steel coupler plug meets the demands of professional ship operators. Standard interlock dimensions ensure compatibility with common hose fittings and adapters used in marine and industrial systems.

Key Features

Single end shut-off mechanism automatically stops flow on disconnection
Heat-treated steel construction for high strength and impact resistance
Precision metal thread ensures a leak-proof, vibration-resistant connection
Corrosion-resistant surface finish is ideal for marine and offshore conditions
Compatible with IMPA 35 hose and coupling standards
Quick-connect / quick-disconnect operation reduces downtime
Suitable for fuel, oil, water, and low-pressure air systems
Available in a range of nominal bores to match existing hoses

Technical Specifications

Attribute	Value
Product Type	Single End Shut Off Steel Coupler (Plug)
Series	PM Series
Material	High-strength steel
Thread Type	NPT / BSP metal thread
Connection Size	1/2" to 4" nominal bore
Maximum Operating Pressure	36 bar (520 psi)
Temperature Range	-20°C to +100°C (-4°F to 212°F)
Valve Type	Single shut-off (plug side)
Seal Material	Nitrile rubber (NBR)
Application	Fuel, oil, water, and air lines
Standards	IMPA 35

Frequently Asked Questions

What does "single end shut off" mean?

It refers to a valve mechanism inside the coupler plug that automatically shuts off fluid flow when the plug is separated from the socket. This prevents spills and pressure loss during disconnection.

What materials are used in the PM Series coupler?

The body is forged from high-strength steel and plated for corrosion resistance. The internal seals are made of oil-resistant nitrile rubber, suitable for petroleum products and water.

Is this coupler compatible with standard marine hoses?

Yes, it is designed according to IMPA 35 dimensions and will fit standard interlock couplings used in marine hose systems. Always verify thread size and bore to match your existing hardware.

Can this coupler be used for air or gas transfer?

It is suitable for compressed air and inert gas at moderate pressures, but the primary design is for liquids. Check the compatibility of seals with the specific gas and pressure range.

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Single End Shut Off Steel Coupler with Metal Thread – PM Series Plug

Key Features

Technical Specifications

Frequently Asked Questions

Inquire About This Product

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