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Home > Industrial Equipment & Components > Valve > Globe Valve > Marine Grade Needle Valve, 316SS, 15000 PSI, 1/2" NPT, Double Block and Bleed, 1 Year Warranty.

Marine Grade Needle Valve, 316SS, 15000 PSI, 1/2" NPT, Double Block and Bleed, 1 Year Warranty.

Product Spotlights

316SS marine-grade needle valve with 15,000 PSI rating, double block & bleed design for safe isolation. 1/2" NPT connections, corrosion-resistant, and backed by ISO9001 quality. 1-year warranty, ideal for harsh environments.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, 316 Stainless Steel (316SS)

Application:

Other, Marine

Pressure Rating:

15000 PSI (1034 bar)

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, 316 Stainless Steel (316SS)

Application Other, Marine

Pressure Rating 15000 PSI (1034 bar)

Connection Type 1/2“ NPT Female Thread

Function Double Block and Bleed

Operation Type Handwheel Operated

Warranty 1 Year

Manufacturer Shanghai Zhibang Valve Manufacture Co., Ltd

Product Overview
As a professional manufacturer of high-performance valves, Shanghai Zhibang Valve Manufacture Co., Ltd proudly presents our Marine Grade Needle Valve, crafted from premium 316 stainless steel and rated for 15,000 PSI. This double block and bleed valve with 1/2" NPT connections is designed to deliver reliable shut-off and isolation in demanding marine and industrial environments. With over 6 years of manufacturing expertise and ISO9001 certification, we ensure each valve meets rigorous quality standards, providing you with a trusted solution for critical flow control applications.

Key Features & Technical Specifications

Material: 316 Stainless Steel – offers exceptional corrosion resistance against saltwater, chemicals, and harsh marine atmospheres.
Pressure Rating: 15,000 PSI (1034 bar) – suitable for ultra-high pressure hydraulic and pneumatic systems.
Connection: 1/2" NPT female threads – standard tapered pipe threads for easy and leak-tight installation.
Design: Double Block and Bleed (DBB) – two independent sealing surfaces with a bleed port between them, allowing safe isolation and venting of trapped pressure.
Temperature Range: -20°F to 450°F (-29°C to 232°C) – suitable for a wide range of operating conditions.
Stem Design: Non-rotating stem with a precision-ground needle tip for smooth, repetitive shut-off and fine flow control.
Packing: PTFE or Graphite packing (optional) – low friction, high temperature resistance, and reduced fugitive emissions.
Operation: Handwheel with T-handle or optional locking device – easy to operate even with gloves.
Warranty: 1 Year – covering manufacturing defects.

Parameter	Specification
Material	316 Stainless Steel (body, bonnet, stem, trim)
Pressure Rating	15,000 PSI @ 100°F (38°C)
Connection	1/2" NPT Female (inlet/outlet), 1/4" NPT bleed port (optional)
Seat Material	316SS to 316SS (metal-to-metal) or optional PEEK/PTFE insert
Packing	PTFE V-ring or Graphite (optional)
Temperature Range	-20°F to 450°F (-29°C to 232°C)
Certification	ISO9001 (factory quality system)

Detailed Benefits

Enhanced Safety: The double block and bleed design isolates upstream and downstream pressure while allowing trapped media to be safely vented, meeting API 6D and other industry standards for isolation.
Corrosion Resistance: 316SS provides superior resistance to chloride pitting and crevice corrosion, making it ideal for offshore platforms, shipbuilding, and chemical processing.
Long Service Life: Precision-machined components and high-quality seals reduce wear and extend maintenance intervals, lowering total cost of ownership.
Versatile Application: Suitable for hydraulic systems, sample lines, gauge isolation, and high-pressure water injection.
Easy Maintenance: Accessible bonnet and packing gland allow quick repacking without removing the valve from the line.

Quality Assurance & Trust
Shanghai Zhibang Valve Manufacture Co., Ltd has been delivering reliable valve solutions since 2016. Our annual export value exceeds US$1 million, serving markets across North America, South America, Europe, Asia, and Africa. Each valve is manufactured under our ISO9001 quality management system, with rigorous pressure testing and dimensional inspection before shipment. We offer a 1-year warranty against manufacturing defects, and our technical support team is available for installation guidance and troubleshooting. Choose our Marine Grade Needle Valve for a safe, durable, and cost-effective solution to your high-pressure isolation needs. Contact us today for a quote or custom configuration.

Frequently Asked Questions (FAQ)

Q: What is the maximum operating pressure of this valve?
A: The valve is rated for 15,000 PSI (1034 bar) at ambient temperature. For higher temperatures, the pressure rating may be derated; please refer to our technical data sheet or consult our sales team.
Q: Can this valve be used for seawater applications?
A: Yes, the 316 stainless steel construction provides excellent resistance to seawater corrosion. However, we recommend using a suitable seal material (e.g., PTFE or PEEK) to enhance performance in extreme environments.
Q: Does the double block and bleed feature allow venting of trapped pressure?
A: Absolutely. The bleed port between the two seating surfaces enables safe depressurization of the cavity before maintenance, in compliance with safety standards.
Q: Are other connection sizes available?
A: Yes, we offer NPT or BSPP connections in sizes from 1/4" to 1". Custom sizes are available upon request. Please contact us with your requirements.
Q: What is the warranty period?
A: We provide a 1-year warranty covering manufacturing defects. Extended warranty options are available for volume orders.
Q: Is this valve suitable for gas service?
A: Yes, it can be used for liquid and gas services. For high-pressure gas, please ensure proper packing selection (e.g., graphite or PTFE) and check compatibility with your media.
Q: Does the valve come with a handle?
A: Yes, a standard T-handle is included. Optional locking devices or extended stems are available.
Q: How do I verify the quality of the valve before purchase?
A: We can provide material certificates (MTR), pressure test reports, and a sample for inspection. Our factory is ISO9001 certified, and we welcome third-party audits.