Pressure regulator "before itself" for steam ASTA series D123/RDS

DN: 15 - 200
PN: 16 - 25
t max°: 200 °С
Body material: high-strength cast iron ВЧ40
Connection: Flanged

Overview

ASTA D100 is a single-seat direct-acting valve designed to automatically maintain a given pressure of the working medium, the operating principle of which is based on balancing the elastic deformation force of the adjustment spring and the force created by the pressure difference in the chambers of the diaphragm actuator.

Design features

  • Modular design - a universal valve compatible with various types of control units
  • Modernized design of the valve unloading chamber
  • Reduced dead zone value
  • Detachable connection of the control unit stem eliminates damage during transportation
  • Full maintainability without dismantling from the pipeline
  • The regulator is supplied complete with a pulse cooler and a needle valve

Options on request

  • Special design of control units (various diaphragms, wide setting ranges, etc.)
  • Non-standard Kvs values

Model overview

Those. information

Nominal diameter DN15 – 200
Nominal pressure PN25 bar for DN 15– 80
16 bar for DN 100– 200
Maximum temperature of the working mediumFrom -30°С to 200 °С
Working mediumSteam, air, and other media compatible with the materials of the regulator construction
Valve capacity, Kvs4.0 – 125 m3/h
Setting pressure range0.4-2.0 bar – red spring
1.0-8.0 bar – yellow spring
4.0-12 bar – two springs
Tightness classVI according to GOST 9544-2015
(seal on the shutter EPDM/PTFE)
III according to GOST 9544-2015
(seal on the shutter “metal-to-metal”)
Dead zoneNo more than 2.5% of the upper limit of the setting according to GOST 11881-76
Proportionality bandNo more than 6% of the upper limit of the setting according to GOST 11881-76
Safety positionNormal open / normally closed
Pressure compensationPressure-balanced
Working medium pulse samplingExternal
Connection typeFlanged according to GOST 33259-2015, isp. B
NameMaterial
1BodyHigh-strength cast iron VCh40
2CoverSteel 25
3SaddleStainless steel 20X13
4PlungerStainless steel 20Х13
5BushingStainless steel 20Х13
6Lower rodStainless steel 20Х13
7CouplingStainless steel 20Х13
8Lower coverGrey cast iron SCh25
9Upper coverGrey cast iron СЧ25
10CouplingStainless steel 20Х13
11Lower actuator rodStainless steel 20Х13
12Upper actuator rodStainless steel 20Х13
13DiaphragmEPDM
14Large spring (yellow)Steel 60С2А
15Small spring (red)Steel 60С2А
16Body sealGraphlex
17Rod sealPTFE / EPDM
18Plunger sealPTFE

Download

Colors

DOP

More in this category:

Need a consultation?

We will tell you in detail about our services, types of work and typical projects, calculate the cost and prepare an individual offer!