Carraro - Control Valve MM

MM Control Valve

The MM series from Carraro is spring-loaded, self-activated, directly controlled valve, and is available as well as pressure-reducing and pressure-relieving / counter-pressure regulating valves. The main function of the pressure reduction valve is to adjust the flow of the medium (gas, steam or liquid) through the regulator to the demand for the medium in the system.

The MM series gives you:

Spring-loaded, self-actuated valves
Pressure reducing and relief functions
Available in 1 to 10 inches
Easy installation and maintenance.

For sales or commercial inquiries please contact us at marine@insatech.com.

MM Series: Versatile, Durable, and Self-Actuated Valves for Pressure Control

The MM series consists of spring-loaded, self-actuated, direct-operated valves designed for both pressure reduction and pressure relief/backpressure applications. Pressure-reducing valves regulate the flow of gas, steam, or liquid through the system, ensuring the flow matches system demand while maintaining pressure at a desired or acceptable range.

Pressure relief valves, on the other hand, protect systems from overpressure and can also function as backpressure regulators due to their excellent throttling capabilities. Available in body sizes ranging from 1 to 10 inches (DN25 to DN250), these valves are built for durability and ease of installation and maintenance, making them suitable for rugged use.

The MM series is divided into two primary groups:

Downstream pressure regulating valves (pressure reducing):
- Single seat (MM81-83)
- Double seat (MM71-73)
Upstream pressure regulating valves (backpressure):
- Single seat (MM82-84)
- Double seat (MM72-74)

Key Features of MM Control Valves

The valves from the MM series has several benefits. See some of them listed below:

Open flow configuration
Available with ISA standard face-to-face dimensions
Three trim options per body size for various applications
Rapid-opening flow characteristics
Trim options: metal or soft seal, single or double port
Leakage classes from II to VI (per ANSI/FCI 70-3)
External pressure sensing capability
Stem sealing available in elastomeric lip seal or graphite gasket
Variety of actuators for different regulation ranges
Extensive selection of elastomeric diaphragms.

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Solutions for Diverse Industries

The MM control valves play a critical role in various sectors ensuring precise flow and pressure management in a range of applications such as:

Air & process gases
Liquids
Steam.

The various industries which the valves are suitable includes, but is not excluded to:

Marine
Oil & gas
General industry
Blanketing systems
Power.

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Specialized Configurations to Meet Your Needs

The MM regulators from Carraro are also available in specialized configurations to meet unique application needs. These regulators can be crafted from exotic materials such as duplex, superduplex, alloy steel, and monel, with short lead times for fast delivery.

They offer flow characteristics beyond just quick-opening and feature stem packing made from PTFE-coated gaskets. The body sizes can extend up to DN 20”.

Additional optional features include extended bonnets, hand wheels, double diaphragms, and separation tanks designed to handle superheated steam or high-viscosity fluids.

The regulators can also be equipped with PTFE-coated bolts and nuts, and come with choices of butt weld and socket weld connections.

For enhanced functionality, pressure gauges can be included as well.

Parts for the MM Series

The MM control valves series has several parts, we have listed them for the MM73 and MM74 below (and see the drawing):

1- Body cover
2- (a-b) Gaskets*
3- (a-b) Studs
4- (a-b) Stud nuts
5- Lower seat
6- Plug*
7- Valve body
8- Upper seat
9- Bonnet
10- Pin
11- Plug stem
12- Actuator fastener ring
13- Packing/lip seal*
14- Follower/lip seal bushing
15- Follower nut
16- Joint
17- Yoke
18- Adjusing screw
19- Lower spring washer
20- Bearing
21- Actuator Stem
22- Balanced lug circlip
23- Spring
24- (a-b) Bolts
25- (a-b) Nuts
26- Lower diaphragm case
27- Upper diaphragm case
28- Diaphragm plate
29- Diaphragm*
30- Screw
31- Upper plug guide bushing
32- Lower plug guide bushing
33- Bearing spherical coupling
34- Bearing ring
35- Adjusing screw bushing.

* Recommended spare parts.

(See all the spare parts for the different MM series valves in the brochure here.)

Spare Parts Kits Available for the MM Series

There is two spare parts kit avaiable for the UBS series control valves.

The 2 Years spare part kit, which include:

Flat gaskets (2 pcs)
Diaphragm
Packing gland gasket/lip seal

The 5 Years spare part kit, which include:

Flat gaskets (2 pcs)
Diaphragm
Packing gland gasket/lip seal
Valve plug.

Need our help? Contact us here!

For technical questions

Martin Søvind Jensen

Tel: +45 2761 4502

Email: Martin.Sovind@insatech.com

Write to Martin

For commercial inquiries

Astrid Mihut

Tel.: +45 5537 2095

Email: Marine@insatech.com

Technical Specifications
Function	Reducing / relieving / back pressure
Size	1" to 10" (standard ISA construction)
Connection	Flanges (ANSI or PN)
Seat	Single or double
Pressue step	Max ANSI 1500, PN 10 to PN 250
CV	From 6 to 850
Valve body	Steel, stainless steel and other "exotic" materials
Trim	Stainless steel and other "exotic" materials
Membrane	Neoprene, EPDM, FKM and more
Input pressure	151 bar(g) (Class 1500)
Pressure control range	From 0.08 to 30.7 bar(g)
Temperature	Min: -196 °C Max: 540 °C

Product specifications and manuals

Brochure - MM Control Valve - Carraro
English | pdf

Download
Manual - MM Control Valve - Carraro
English | pdf

Download

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