19000 Series PRV

The 19000 Series of pressure relief valves are ASME B & PVC, Section VIII compliant for liquid service applications. Seat tightness, blowdown and capacity on all types of media meets the industry needs for overpressure protection in
chemical, petrochemical, refinery, power generation (nuclear and conventional) and other commercial applications. NOTE: Colors in the bars above the valves are consistent with tabs throughout this website.

Specifications:

Introduction

The 19000 Series valves are designed and manufactured in compliance with ASME B & PVC, Section VIII and Section III (Class I, II and III) as well as being CEN compliant to the European proposed standards for safety valves. Seat tightness, blowdown and capacity on all types of media meets the industry needs for overpressure protection in chemical, petrochemical, refinery, power generation (nuclear and conventional) and other commercial applications.

General Information

The 19000 Series threaded safety relief valve has 316 stainless steel trim as standard material. Reliable performance and easy maintenance procedures are characteristics of this valve (when properly installed in suitable applications for its design).
The 19000 Series valves has three pressure classes, 19000L (5 through 290 psig), 19000M (291 through 2000 psig), and 19000H (2001 psig and up). Standard 19000 parts are used for both liquid applications and gas applications. It is designed for short blowdown on all medias, typically less than 10%.
All 19000 Series valves have fixed blowdown. This means that the parts are designed so that there is no blowdown adjustment required when setting or testing the valve.

Design Options

a. 0-Ring seat seal valves All 19000 Series valves are available with an 0-Ring seat seal, as a design option. This optional design provides a bubble tightness in excess of 97% of the valve set pressure, in order to meet application requirements beyond the normal capabilities of metal to metal seat valves. 19000 Series valves with the 0-Ring seat seal option are identified by the suffix DA (e.g., 1-19096L-DA).

b. Lifting Levers, Caps and Gags All 19000 Series valves are designed so that field conversion from the standard screwed cap to a plain lifting lever cap, or to a packed lifting lever cap (or vice versa) does not require valve assembly during resetting. The lifting lever option is designed to open the valve at 75% of the valve set pressure, in compliance with ASME B & PVC, Section VIII. Further, all available 19000 Series valve caps may be equipped with a gag, upon customer request.

c. Inlet/Outlet Connections All 19000 Series valves can be provided by CONSOLIDATED with flanges, threaded or socket weld inlet/outlet connections upon customer request.

19000 Standard Valves

This product is normally supplied with threaded inlet and outlet connections. Socket weld or flanged end connections are available as well.
Product type designations change depending on connection sizes, orifice sizes, pressure range, and whether connections are male or female.
Unless otherwise specified, the valve is always supplied with a screwed cap. The exception to this would be where ASME requires levers for steam, air and water service over 140°F (60°C).

Springs of precipitation hardened stainless steel are specified for -75°F to 800°F (-59°C to 426.6°C) and the valves carry a “c” suffix in that case. Inconel springs are used for temperatures 801 °F to 1100°F (427.2°C to 593.3°C) and the valve carries a “t” suffix. When selecting valves for back pressure applications, the following limits apply.

•    Constant back pressure: 400 psig maximum
•    Variable back pressure (superimposed or built-up): 400 psig or 10% of set pressure, whichever is smaller.

Product variations consist of:

•    19000SG – Sour Gas Trim
•    19000DA – Soft Seat
•    19000MBP- Back Pressure Compensation

Product material variations include:

•    316 Stainless Steel
•    Monel
•    Hastelloy
•    Alloy 20

1900 Series

The 1900 Series of pressure relief valves provides a wide scope of design in both pressure and temperature ranges. ASME B & PVC, Section VIII certified for vapor, liquid and steam applications meets most overpressure protection requirements of today’s industry. Check the tabs below for additional product information and option.

Specifications:

Introduction

The comprehensive line of spring loaded CONSOLIDATED safety relief valves represents over one hundred years of valve manufacturing experience in meeting and solving industry problems involving a wide scope of valve applications. The flanged CONSOLIDATED safety relief valve line consists of valves in a variety of sizes and materials. Each product offering is unique and judgements are required in selecting the proper option. To accomplish the selection process start with the General Information section of this catalog and follow the prescribed steps necessary to finalize the selection. This Section, 1900 SRV, should be reviewed against the user’s specifications and product offerings selected. Beyond this step, proceed with sizing and then confirmation of the pressure and temperature limits (API or ASME). 1900 Flanged Series safety relief valves are supplied in many variations to suit specific applications.

Product variations covered in subsequent pages are noted below:

• 1900 Conventional
• 1900-30 Bellows Construction
• 1900-35 Balanced Bellows with Auxiliary Balancing Piston
• 1900HA Special Materials for Hydrofluoric Acid Service
• 1900SG Sour Gas Trim
• 1900DA Soft Seat
• 1900LA Liquid Trim with Metallic Seats
• 1900DA – LA Liquid Trim with Soft Seats
• 1900TD Special Trim for Steam & Organic Heat Transfer Media

1900 Series Conventional Safety Relief Valves

Steel, Flat Seat, Top Guided, High Capacity, Stainless Steel Trim

This standard rugged configuration is equipped with corrosion resistant trim and a carbon steel body, bonnet and cap. The components are top guided, providing for free and repeatable action. The flat disc seat provides for easy maintenance and remachining. The exclusive “Eductor Tube” minimizes bonnet cavity pressure so that product performance is predictable. The nozzle is bottom inserted and rigidly held in position, providing a corrosion resistant path of flow to the valve and corrosion resistant seating surfaces.

1900-30 Series Bellows Construction

This valve is the same as the conventional design except that a bellows has been added. When the bellows is installed, the eductor tube is removed. Caution: It is important that the bonnet be vented to the atmosphere. A bellows is added to the conventional valve to deal with any of several situations:

Back pressure entering the valve through the valve outlet is excessive or variable. If back pressure fluctuates with ±10% of a nominal value, a bellows is required. If a built up back pressure exceeds 10% of the set pressure or cold differential set pressure, a bellows must be used.

If the entering fluid is a slurry, highly viscous, or of a nature that it can enter the critical clearances between the guides/disc holder, protect that area with a bellows. If the fluid being handled is corrosive to the upper works of the valve, isolate the bonnet chamber through use of a bellows. Conventional valves can be easily converted to a bellows design or vice versa through the use of retrofit kits. All CONSOLIDATED

1900-30 Series valves are balanced bellows designs, meaning that they fully compensate for the effects of back pressure.

1900-35 Series Balanced Bellows (with Auxiliary Balancing Piston)

The Balanced Bellows seals the body and fluid stream from the bonnet and working parts. Auxiliary balancing piston assures proper valve performance by compensating for back pressure in case of bellows failure. The use of an auxiliary balanced piston is indicated when:

back pressure (either constant or variable) exists and; excessive pressure may build in the bonnet as a result of pressure build-up in the bonnet vent piping and; resultant build-up of pressure in the bonnet would cause a dangerous condition.
Caution: It is important that the bonnet be vented to the atmosphere.

Codes and Standards

The Consolidated 1900 series is compliant with the following codes and standards:

ASME B & PVC, Section II – Material

(Applicable as required by ASME B & PVC, Section III or VIII)

ASME B & PVC, Section III, class 2 and 3 (Gas, Vapor, and Liquid Service)

ASME B & PVC, Section VIII (Gas, Vapor, and Liquid Service)

ASME B16.34 and ASME B16.5

API 520, 526 and 527

ISO 4126

NACE MR0175 Standard Material Requirements

API Standard 526-1995

Safety relief valves specified within this catalog comply with API standard 526 – Fourth Edition, 1995. The 1900 Series valves previously complied with API standard 526 – Third Edition, 1984. In some cases dimensional and nominal flanges sizes differ between these two editions. When ordering replacement valves that must comply with API Standard 526 – Third Edition, 1984, contact the factory for verification of the correct replacement.