1/2"-2", 150 - 600#
The exterior components of ValvTechnologies’ valves are coated with HVOF RiTech™ hardcoating that offer sealing surfaces that are protected from flow induced erosion. The stem is sealed against leakage between the body by a live-loaded Grafoil packing with stainless steel mesh extrusion protectors on the top and bottom. The live-loading packing controls fugitive emissions and prevents any serious packing problem of over or under tightening. The integral seat design providers improved performance over conventional replacement seats and eliminates leakage. In addition to providing superior valve components, ValvTechnologies backs its parts by offering a four year, zero-leakage guarantee.
ValvTechnologies, offers a full range of zero-leakage, metal-seated insulation and control valves available in a variety of end connections, sizes and pressure classes to meet your specifications. The standard product line offers a variety of end connections from socket weld, butt weld, flanged and more, is available in sizes 1/4” to 4” and ASME/ANSI pressure classes 150 to 4500, including interpolated and special ratings.
Simplicity of Design
Simplicity of design with few components.
- Body studs
- Seat spring
- Upstream seat guide
- Stem keys
- Body nuts
- End cap
- Body seal
- Gland nuts
- Gland springs
- Mounting bracket
- Gland studs
ValvTechnologies’ exclusive packing design offers die-formed 316SS wire mesh, anti-extrusion top and bottom rings with a Grafoil center ring and has a minimum four bolt flange design. The live-loaded design also offers twice the standard loading and eliminates maintenance and stem packing leaks.
HVOF RiTech™ Coating
The sealing surfaces, ball and integral seat of ValvTechnologies valves are coated with a super-hard chrome carbide alloy and then diamond lapped for a precision fit using a hydrogen fueled system. The hydrogen provides the best quality of all HVOF coatings. The coatings are extremely resistant to attack by catalysts, abrasives and corrosives fluids, provide exceptional hardness (70 on the Rockwell C Scole) and offers temperature ratings to 1800℉.
- Repeatable bubble tight shut-off = zero-leakage
- Tested with air (at low pressure), N2 gas and water (at high pressure)
- Zero bubbles or drops allowed
Blow-Out Proof Stem
The one-piece, blow-out proof stem is hardfaced and polished with a surface hardness of 60 RC to prevent galling. The stem does not rely on pins or collars and is inserted through the body cavity and guided by the hard-faced gland.
The body seal is designed to be positioned out of the flow path, protecting it during the cycling. The split body design allows for the convenience of inline repair-ability. Located away from the flow path, the 17-4 ph body gasket is self-energized, features a crush style design with a graphite overlay for the ease of assembling. Since the body gasket is located away from the flow path, the high velocity flow from the valve (when in the open position) does not affect the body gasket area in any way. Additionally, the body gasket stresses in a separate nose cone of the end cap and therefore not affected by the seat sealing forces or the packing area.
The ball of the valve is a high strength alloy with chrome carbide HVOF RiTech™ hardcoating (66-69 RC hardness) diamond lapped to ensure bubble tight shut-off.
The integral seat design of ValvTechnologies valves improves performance over conventional replacement seats and offers absolute zero-leakage. The seat is also self cleaning, coated with the chrome carbide HVOF RiTech™ hardcoating and is protected from flow media in both the open and closed positions because the seat is located away from the flow path.
The upstream seat of the valve is a high strength alloy with nitride coating to prevent galling that transfers the Belleville Spring load to the ball.
The Belleville Spring is the heart of the valve, featuring an Inconel 718 material that keeps the ball in contact with the integral seat, preventing ingress of the process between the ball and seat. The spring is designed so the stresses in the spring do not exceed yield and creep conditions after the initial spring seat. This ensures a long term spring load; which is not common in typical Belleville Spring designs.
The gland packing set consists of 316SS wire mesh, top and bottom anti-extrusion rings with a nuclear grade Grafoil center ring. The packing set is live-loaded, eliminating maintenance and is able to hold constant pressure without adjustment.
The body is the primary pressure boundary and requires zero maintenance and is available with socket weld or butt weld ends with Graylock® Hubs quick disconnect and other end connections.
The four-bolt gland flange evenly distributes the force of the live-loaded gland bolting and is a bearing for the stem. The gland is also hardfaced, nitrided to prevent galling.
The integral seat is machined into the end cap, eliminating the potential for leaks between a loose seat and the valve body.
V1-3 — ANSI 900-4500
- Zero-leakage guarantee
- Repeatable, bubble tight shut-off
- High temperature/high pressure applications
- Low pressure drop
- Uni-directional & bi-directional designs
- Low maintenance, long service life in severe applications
- Quarter turn operations, readily automated
For more detailed valve schematics choose from the sections of drawings below.
Drawings Butt Weld
To view drawings, click on a link
V1-3 Butt Weld
Drawings Socket Weld
To view drawing, click on a link
V1-3 Socket Weld
Standards Applicable to Valves for Power Plant applications ASME TDP-1, ASME B31.1 Boiler and ASME Pressure Vessel Code, Section 1.
ValvTechnologies is dedicated to providing dependable products and services of the highest standards. For almost 30 years, we have endeavored to supply valves built with confidence and quality backed with a zero-leakage guarantee. Our quality management system is registered to ISO 9001:2008, API Spec Q1 and Pressure Equipment Directive 97/23/EC to ensure the quality and consistency necessary to achieve our guarantee. Furthermore, our commitment to quality excellence is rooted in our Quality Policy: We will provide superior, defect-free products and services that meet or exceed all legal and regulatory requirements to our customers. Continual improvement will be the basis for enhanced effectiveness by meeting our identified Key Process Indicators (KPIs).
Throughout the implementation of this Quality Policy, we must achieve the goal of providing and being recognized by our customers as an industry quality and reliability leader for all products and services provided by the company. Hence, the only acceptable goal in quality and reliability is a level that surpasses our customer’s expectations. How fast we reach that goal is the measure of our progress.
Therefore, in pursuit of our commitment to continuously providing the best products and services to you, our customer, we would appreciate your response to our Customer Satisfaction Survey. We value your opinion and the results of the survey will help us identify improvement opportunities to serve you better.
For a list of certifications, please click here http://www.valv.com/certifications/
Click here for ASME Code Standards.
For maintenance of ValvTechnologies valves, please refer to the ValvTechnologies V Series IOM or contact our 24-hour service line at (713) 860-0400.
Need a new valve for installation? Would you like to replace another valve? Clik on the link to access the Request for Quote Form: http://vti.valv.com/QuoteRequest.aspx
Click here to access the part breakdown for ValvTechnologies valves through the Valve Numbering System documents.
Every valve testing standard had an acceptable leakage rate; this includes ANSI FCI 70-2 CL V & VI, MSSP-61 and API 598, the three most applied standards. There are two aspects that the test standards have in common:
A) They all allow leakage
B) The hold times vary
Click here for more on how ValvTechnologies, Metal Seated Valves far exceed the competition with zero-leakage.
For further protection valves can be fitted with removable and reusable valve insulation blanket jackets. Click here for more information.
ValvTechnologies’ new external stop mounting hardware minimizes or eliminates stem and sealing performance problems caused by a faulty reinstallation of an operator on an automated valve. To read more about ValvTechnologies optional mounting hardware, click here.
- Special end connections available
- Bi-directional sealing
- Tandem arrangements
- Complete automation packages available
- Characterized trim