Dresser Consolidated 1900 User Manual (English)

Questions and Answers:

T
Timothy StewartAug 3, 2025
What to do if my Dresser Control Unit has seat leakage?
- S
  Sarah KellyAug 3, 2025
  If your Dresser Control Unit is experiencing seat leakage, it could be due to several reasons. The seats might be damaged, requiring rework or replacement. Improper installation, such as issues with the piping, could also be the cause, so inspect the installation. If the operating pressure is too close to the set pressure or there's excessive system vibration, increase the differential and recheck the application. Misalignment of valve components can also lead to leakage; ensure the valve is installed vertically and properly assembled. Finally, trash trapped on the seats can cause this issue; pop the valve to clean the seats or rework them.
K
Kelsey StewartAug 13, 2025
Why is my Dresser Control Unit chattering?
- J
  juliemezaAug 13, 2025
  If your Dresser Control Unit is chattering, it may be due to improper installation or valve sizing. Check for any piping restrictions and verify the required capacity. Another potential cause is built-up back pressure, so inspect the outlet piping. Finally, the issue might stem from an improper ring setting, so check the ring setting.
J
Joshua PhillipsAug 22, 2025
How to fix simmer in Dresser Control Unit?
- M
  Michael HuangAug 22, 2025
  If your Dresser Control Unit is experiencing a simmer, it could be due to damaged seats, in which case you should rework the seats or replace the part. It might also be due to a wide nozzle seat, which requires reworking the seat. An improperly adjusted ring setting could also be the problem, so check the ring setting. Finally, misalignment or binding can cause a simmer, so inspect the valve and its installation.

Dresser Consolidated 1900 Specifications

General

Brand	Dresser
Model	Consolidated 1900
Category	Control Unit
Language	English

Summary

Consolidated Safety Relief Valve Type 1900 Manual

Design Options Overview

Details available design options like Bellows, O-Ring Seat, Liquid Trim, and Thermodisc.

Product Safety Sign and Label System

Safety Alerts and Precautions

Explains safety labels, signal words (DANGER, WARNING, CAUTION), and safety advice for operation.

Terminology for Safety Relief Valves

Design Features and Nomenclature

Handling, Storage, and Pre-Installation

Safe Handling and Storage

Guidelines for safe handling, lifting, and proper storage environment to prevent damage.

Pre-Installation Checks

Instructions for pre-installation, including flange protector checks and preventing contamination.

Recommended Installation Practices

Mounting Position Guidelines

Specifies the requirement for vertical upright mounting to ensure proper valve operation.

Inlet Piping Requirements

Details on inlet piping design, size, and pressure drop to prevent chattering and ensure capacity.

Outlet Piping Considerations

Guidance on discharge piping alignment, support, thermal expansion, and common headers.

Disassembly Instructions

General Disassembly Information

Covers safety precautions, decontamination, and general notes before disassembling the valve.

Specific Disassembly Steps

Detailed step-by-step procedures for disassembling valve components, including specific orifice types.

Cleaning Procedures

Parts Inspection Criteria

Nozzle Inspection

Criteria for inspecting nozzle dimensions, seat width, and bore for replacement or reconditioning.

Standard Disc Inspection

Details on inspecting standard disc dimensions and identifying areas for machining.

Thermodisc Replacement Criteria

Guidelines for replacing Thermodisc components based on dimension 'A' and thermal lip thickness.

Disc Holder Inspection

Criteria for inspecting disc holders based on 'G' dimension and identifying different designs.

Guide, Spindle, and Spring Inspection

Inspection criteria for guides, spindles, and springs, covering wear, damage, and dimensions.

Maintenance Instructions

General Maintenance Information

Overview of seat inspection, reconditioning, and the use of Glide-Aloy components.

Lapping Procedures

Procedures for lapping nozzle and disc seats, including precautions and O-ring surface lapping.

Machining and Remachining

Instructions for remachining nozzle seats, bores, and disc seats, including lathe setups.

Adjustment and Checking

Procedures for checking spindle concentricity, set pressure changes, and lift on restricted valves.

Reassembly Procedures

General Reassembly Information

Guidelines for reassembling components, emphasizing cleanliness, gasket checks, and lubrication.

Lubrication for Reassembly

Specifies the use of nickel-based anti-seize lubricant on threads and bearing surfaces.

Specific Reassembly Steps

Detailed steps for assembling parts, including nozzle torque, disc/holder assembly, and bellows installation.

Setting and Testing Procedures

General Setting and Testing Information

Overview of valve setting, testing on a test stand, and spring replacement guidelines.

Test Equipment and Media

Lists essential equipment and recommended media for testing safety relief valves.

Setting the Valve

Procedure for setting the valve to the required set pressure, including adjustments for cold differential pressure.

Set Pressure Compensation

Details on compensating set pressure for temperature and back pressure variations using multipliers.

Seat Tightness Testing

Methods for testing seat tightness for metal-to-metal and O-ring seat seals using specified pressures.

Blowdown Adjustment

Procedure for adjusting blowdown by manipulating the adjusting ring for desired reseating pressure.

Hydrostatic Testing and Gagging

Manual Popping of the Valve

Valve Conversion Procedures

General Conversion Information

Overview of converting valves between conventional and bellows types, including parts required.

Conventional to Bellows Conversion

Steps and parts needed to convert a conventional valve to a bellows type.

Bellows to Conventional Conversion

Steps and parts needed to convert a bellows valve to a conventional type.

Trouble Shooting Type 1900 Valves

Maintenance Tools and Supplies

Recommended Spare Parts for 1900 Valves

Manufacturer's Warranty, Service, Training & Repair

Warranty Information and Policies

Details on product warranty, handling of defective items, and unauthorized repair policies.

Field Service Support

Information on Dresser's field service capabilities, engineer qualifications, and support availability.

Factory Repair Facilities

Overview of the CONSOLIDATED repair center and its capabilities for specialized repairs.

Maintenance Training Programs

Information on service seminars designed to train personnel in preventative maintenance and valve safety.

Optional Glide-Aloy Parts and Processing

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