Custom Fabricated & Heavy Duty Dampers Design Options

Design Options

SEATS

STUFFING BOXES

Swing-Thru 3%-5% Leakage or as required

Slant Angle (No seat) Higher CV

Step Seat for 1% Leakage or Machined for ANSI/FCI 70-2 Class III Shutoff

**Standard**
No.	Qty.	Description	Material
A	1	STUFFING BOX	CS
B	1	GLAND FOLLOWER	CS
C	2	STUD	GRB7
D	2	SPRING	COMM
E	6	NUT	GR2H
F	2	FLAT WASHER	GR5
G	1	PACKING	COMM
H	4	BRANDED PACKING	COMM

Tadpole Seat for ANSI/FCI 70-2 Class II or Class III Shutoff

Inflatable Seal Ensures Gas-Tight Operation for Maximum 500°F

Rubber Lined Body and Polished Disc Edge for Tight Shutoff up to 450°F

Special Machined Disc and Seat Profile for Tighter Shutoff

$Step Seat Refractory Lined Industrial Damper$

Step Seat Refractory Lined

**Air Purge or Grease Fitting**
No.	Qty.	Description	Material
A	1	STUFFING BOX	CS
B	1	GLAND FOLLOWER	CS
C	2	STUD	GRB7
D	2	SPRING	COMM
E	6	NUT	GR2H
F	2	FLAT WASHER	GR5
G	2	DIE FORMED PACKING	COMM
H	2	BRANDED PACKING	COMM
I	1	LANTERN RING	304SST
J	1	NPT AIR PURGE OR GREASE INLENT	COMM

BODY CONFIGURATIONS:
Round, Rectangular, Square or Obround

DISC TYPES:
Single Disc, Split Disc, Eccentric or Double Block and Bleed

SIZES:
2 inches to 144 inches or larger

Materials of Construction

HIS can manufacture out of any weldable, castable or forgeable alloy. We have extensive experience in high temperature, erosive or corrosive gas flow.

Alloy	Recommended Use Temperature (°F)
A387, GR11, GR 22	800 - 1100
Corten A, A516 GR70	800 - 1100
304, 304H, 304L, 321, 347	800 - 1400
316, 316L, 309	800 - 1600
INCONELS	1000 - 1800
330,333,310,HR160	1600 - 2000
A297 GRHK, HR160	1600 - 2100
SUPERTHERM CERAMICS	1800 - 2300
CERAMICS, REFRACTORY	1800 - 3000

**For Less than 5 Psi Service**
No.	Qty.	Description	Material
A	1	STUFFING BOX	CS
B	1	GLAND FOLLOWER	CS
C	1	INBOARD BEARING	CARBON
D	5	BRANDED PACKING	COMM