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Bulletin 74.1:Y692

November 2014

D102032X012

www.fisherregulators.com

Type Y692 Gas Blanketing Regulator System

W5930-1

Figure 1. Type Y692 Low-Pressure Gas Blanketing Regulator

Introduction

An Accu-Pressure™

Gas Blanketing Regulator System

reduces a high-pressure gas, such as Nitrogen, to

maintain a protective environment above any liquid

stored in a tank or vessel when the liquid is being

pumped out. Also when the vessel is suddenly cooled,

causing vapors inside the vessel to contract, the

regulator system replaces the volume of contracting

vapors with a volume of blanketing gas to prevent

the internal vessel pressure from decreasing. In both

cases, a slight positive vessel pressure prevents

outside air, moisture and other contaminants from

entering the vessel and the possible collapse of the

vessel walls.

The Type Y692 (Figure 1) is a direct-operated

regulator used for accurate pressure control on

very low-pressure blanketing systems. Downstream

pressure is sensed through a pitot tube installed in

the lower casing of the regulator for units with internal

pressure registration or through a downstream control

line for units with external pressure registration.

The Type Y692 is available in NPS 1-1/2 and 2 /

DN 40 and 50 body sizes.

Features

• Ease of Inspection and Maintenance—The union

nut connection between the body and actuator

permits access to the disk and orice by only

removing the diaphragm casing assembly without

removing the body from the line.

• Accuracy of Control—Large diaphragm areas

provide more precise control even at low-pressure

settings and the pitot tube also creates a dynamic

boost that helps provide greater capacity.

• Speed of Response—The downstream pressure is

sensed directly by the diaphragm through the pitot

tube providing quick response.

• Ease of Installation—The Type Y692 is easy

to install in the pipeline because no additional

connections are required.

1 2 3 4 5 6 ... 11 12

Indice de contenidos

Pagina 1 - Bulletin 74.1:Y692

Bulletin 74.1:Y692November 2014D102032X012www.fisherregulators.comType Y692 Gas Blanketing Regulator SystemW5930-1Figure 1. Type Y692 Low-Pressure Gas

Pagina 2

Bulletin 74.1:Y69210Table 6. Orice Sizes and Coefcients for Relief Valve SizingBODY SIZE ORIFICE SIZEWIDE-OPEN CvWIDE-OPEN CgC1NPS DN In. mm1-1/2 an

Pagina 3

Bulletin 74.1:Y69211Ordering InformationCarefully review the Specications section, then specify the desired selection on the Ordering Guide. If a pil

Pagina 4 - Type Y692

Pagina 5

Bulletin 74.1:Y6922AvailableCongurations Direct-operated pressure reducing regulator with external or internal pressure registration with seven ou

Pagina 6

Bulletin 74.1:Y6923Table 1. Control Pressure RangesCONTROL PRESSURE RANGE WITH CASE BARREL POINTED DOWNCONTROL SPRING COLOR CODECONTROL SPRING PART N

Pagina 7

Bulletin 74.1:Y6924Type Y692M1042INLET PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSUREJuly 2007Type Y692TANK PRESSUREVACUUM PRESSUREPRE-EXPANSION PRESSURE

Pagina 8

Bulletin 74.1:Y6925Principle of OperationThe Type Y692 Gas Blanketing Regulator reduces a high-pressure gas to maintain a positive low-pressure of bla

Pagina 9

Bulletin 74.1:Y6926tank, product and personnel in cases of equipment failure,reexposureorotherconditionsthatcouldcause the tank pressure or v

Pagina 10

Bulletin 74.1:Y6927Ordering InformationWhen ordering, specify: 1. Type of gas being controlled (nitrogen fuel gas, etc.); list any factors such as i

Pagina 11

Bulletin 74.1:Y6928Table 5. Blanketing Regulating Capacities in SCFH / Nm3/h of 0.97 Specic Gravity Nitrogen- continued -BODY SIZEOUTLET PRESSURE RAN

Pagina 12 - Bulletin 74:1:Y692

Bulletin 74.1:Y6929Table 5. Blanketing Regulating Capacities in SCFH / Nm3/h of 0.97 Specic Gravity Nitrogen (continued)BODY SIZEOUTLET PRESSURERANGE