Monoflange Valves

Engineered for critical high-pressure isolations, Frigate’s Monoflange Manifold Valves combine compact, space-saving designs with exceptional process safety. These premium valves eliminate traditional multi-valve structures to radically reduce potential leak paths and optimize system integrity in severe industrial environments.

Design Standards

ASME B16.5, ASME B16.34, API 6D, and ISO 15848 compliant architectures

Leakage Minimization

Single-piece forged body drastically reduces external joint leak paths

Material of Construction (M.O.C)

CS, AS, SS, DSS, SDSS, SASS, Monel, Hastelloy, Inconel, Titanium, Tantalum

Configuration Options

Single Isolation, Block & Bleed, Double Block & Bleed (DBB)

Bonnet Design Types

Standard, Double Block & Bleed (Bonnet-OS & Y Type)

Order Type

Quantity Range

Lead Time*

Sample

1 – 5 Units

2 – 3 Weeks

Batch Production Order

6 – 50 Units

4 – 6 Weeks

Bulk Industrial Contract

51 – 200+ Units

8 – 12 Weeks

*Please note that the timeframes listed above represent indicative ranges. Actual delivery schedules depend on specific material configurations, engineering customizations, and factory queue status.

Product Description

Frigate’s Monoflange Manifold Valves offer a robust, integrated alternative to conventional multi-valve installations for pressure instrument isolation. Featuring precise single block, block and bleed, or double block and bleed configuration options, they streamline maintenance workflows while guaranteeing positive isolation under extreme operating conditions.

Inlet/Outlet Connections

Flanged Type to Threaded (NPT / BSP / BSPT) Options

Available Nominal Sizes

1/2″ to 3″

Pressure Rating Range

Class 800# to Class 2500#

Primary Isolation Type

Heavy-duty integrated needle/ball/globe configurations

Vent / Bleed Connection

Standardized NPT internal threaded vent outlets

Sealing Characteristics

Bubble-tight metal-to-metal or soft-seated options

Operating Temperature Range

Dependent on seal material (Cryogenic to High-Temperature options available)

Bore Size (Orifice)

Optimized for minimized pressure drop and accurate instrument readings

Service Compatibility

Sour gas (NACE compliant), high-temperature, and corrosive chemical streams

Testing & Certifications

Hydrostatic, pneumatic body and seat testing as per API 598 / BS EN 12266-1

Nominal Valve Size (inches)

Stem Diameter (mm)

Body Height (mm)

Total Component Length (mm)

1/2″

6.5

110

145

1″

125

160

2″

150

195

3″

185

230

Technical Advantages

By integrating isolation and venting functionalities into a single forged piece, these monoflange assemblies significantly minimize weight, installation costs, and structural stress on piping networks. Their heavy-duty design maximizes safety by providing redundant leak-path elimination and ensuring bubbles-tight shutoff across highly corrosive process mediums.

Compliances

ISO 9001:2015

ISO 14001:2015

ISO 45001:2018

Let's Get Started

Need reliable valve for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

Industry Applications

Oil & Gas Processing

Provides secure, leak-proof primary instrument isolation on offshore platforms, production headers, and complex gas distribution manifolds.

Chemical Refining

Withstands highly aggressive chemical environments through premium M.O.C. configurations like Hastelloy and Titanium for safe sampling.

Petrochemical Plants

Maintains system integrity across volatile hydrocarbon streams, high-temperature cracking units, and process gas lines.

Power Generation

Deployed in superheated steam networks and high-pressure feedwater monitoring loops to ensure absolute control and safe isolation.

Water & Wastewater

Optimizes pressure instrument networks in chemical dosing, desalination processing, and heavy-duty municipal supply infrastructures.

Marine & Offshore Engineering

Offers compact, space-saving design and high marine corrosion resistance ideal for dense topside piping layouts and vessel networks.

Frigate Approved Quality Management System

At Frigate, quality is built into every stage of manufacturing. Our approved Quality Management System ensures that every material component.

Incoming Material Checking

Before production begins, all incoming materials are checked against specifications, drawings, and supplier documents.

In-Process Inspection

Quality is monitored during manufacturing to prevent defects and maintain process consistency.

Final Dimensional Checking

Finished parts are inspected before dispatch to confirm compliance with customer drawings and tolerances.

Packaging Control

Finished components are packed safely to prevent damage during handling and transportation.

Incoming Material Checking

In-Process Inspection

Final Dimensional Checking

Packaging Control

Quality Document

To help buyers evaluate our quality systems, we provide sample documents that reflect our inspection and reporting standards.

How We Delivered

Complex geometries engineered solutions that move businesses forward.

Solar Inverter Enclosure

units per month

Bento Boxes for D2C Segment

Units Manufactured Monthly

0 +

Defence-Grade Cable Supply

Cost savings

0 %

Flange Assembly for Pump

Faster Production

0 %

Having Doubts? Our FAQ

What are the distinct configurations available for Frigate's Monoflange Valves?

We offer three core configurations based on your isolation needs: Monoflange Single Isolation, Monoflange Block & Bleed, and Monoflange Double Block & Bleed (including OS&Y bonnet types) to ensure optimal process loop security.

Which exotic materials can Frigate supply for high-corrosion applications?

Beyond Carbon Steel (CS) and Stainless Steel (SS), we fabricate monoflanges in Duplex (DSS), Super Duplex (SDSS), Monel, Hastelloy, Inconel, Titanium, and Tantalum to match extreme environments.

What are the main benefits of using a monoflange over a traditional valve manifold hook-up?

Monoflanges feature a single forged body that drastically reduces potential leak paths, slashes structural weight, lowers installation labor costs, and provides structural stiffness against piping vibrations.

Do these valves support compliance for sour gas and hazardous environments?

Yes. Our monoflange valves can be custom-tailored to meet NACE MR0175/ISO 15156 standards for sour gas service, making them highly reliable for hazardous oil and gas applications.

What pressure ratings can Frigate Monoflange Manifold Valves accommodate?

Our engineering line is designed to operate safely within high-pressure environments, offering standard compliance across Class 800#, 1500#, and up to Class 2500# systems.

We'd love to Manufacture for you!

Submit the form below and our representative will be in touch shortly.

LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Components Built for Critical Performance

Engineered Products for Critical Applications

Monoflange Valves

Order Type

Quantity Range

Lead Time*

Product Description

Inlet/Outlet Connections

Available Nominal Sizes

Pressure Rating Range

Primary Isolation Type

Vent / Bleed Connection

Sealing Characteristics

Operating Temperature Range

Bore Size (Orifice)

Service Compatibility

Testing & Certifications

Nominal Valve Size (inches)

Stem Diameter (mm)

Body Height (mm)

Total Component Length (mm)

Technical Advantages

Compliances

ISO 9001:2015

ISO 14001:2015

ISO 45001:2018

Let's Get Started

Industry Applications

Frigate Approved Quality Management System

Quality Document

How We Delivered

Having Doubts? Our FAQ

We'd love to Manufacture for you!

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

Get Your Quote Now

Monoflange Valves

Get Latest Price

Monoflange Valves

Get Latest Price