Yoshitake BLV-1S is a stainless steel ball valve with a screwed connection, suitable for a wide range of applications including steam, air, cold and hot water, oil, and other non-dangerous fluids. The valve is supplied in the open position and has no restrictions on fluid flow direction.

Specifications

Application	Steam, Air, Cold and hot water, Oil, Other non-dangerous fluids
Maximum pressure	According to the Pressure and Temperature Rating
Body Material	Cast Stainless Steel (ASTM A351-CF8M / SCS14A)
Ball Material	Cast Stainless Steel (ASTM A351-CF8M / SCS14A)
Stem Material	Stainless Steel (ASTM A276-316)
Ball Seat	PTFE
Connection	JIS Rc screwed, NPT screwed

Pressure and Temperature Rating

INFO

Please refer to the pressure and temperature rating chart for the maximum allowable working pressure relative to fluid temperature.

Dimensions and Weight

Nominal Size	d	d1	L (mm)	H (mm)	W (mm)	Weight (kg)
8A	5	Rc, NPT 1/4	39	28.5	65	0.1
10A	7	Rc, NPT 3/8	44	31	88	0.1
15A	9.2	Rc, NPT 1/2	56.5	38	110	0.2
20A	12.5	Rc, NPT 3/4	59	40	110	0.2
25A	15	Rc, NPT 1	71	47	110	0.4
32A	20	Rc, NPT 1-1/4	78	52	110	0.5
40A	25	Rc, NPT 1-1/2	83	58.5	155	0.8
50A	32	Rc, NPT 2	99	64.5	155	1.3

Parts List

No.	Name of Parts	Material
1	Body	Cast Stainless Steel (ASTM A351-CF8M)
2	Retainer	Cast Stainless Steel (ASTM A351-CF8M)
3	Ball	Cast Stainless Steel (ASTM A351-CF8M)
4	Seat A	PTFE
5	Seat B	PTFE
6	Stem	Stainless Steel (ASTM A276-316)
7	Thrust Washer	PTFE
8	Packing	PTFE
9	Gland Ring	Stainless Steel
10	Spring Washer	Stainless Steel
11	Stem Nut	Stainless Steel
12	Handle	Stainless Steel
13	Handle Sleeve	PVC
14	Lock Plate	Stainless Steel

Storage, Installation, and Operation

Warning

Before applying fluid, make sure that there is no danger if the fluid flow into the end of the piping. Failure to follow this notice may result in property damage due to fluid leakage.

Maintenance Warning

Completely discharge the pressure inside of the product, line and equipment before inspection and maintenance. For high temperature fluid, cool down the product til it can be touched with bare hands. Failure to follow this notice may result in injury or burns due to residual pressure.

Cautions

• Store the product indoors in a dust-free, low humidity, dry and ventilated environment.
• Installation should be conducted by suitably trained personnel, wearing protective head, eye, hand and foot protection.
• The product can be used for "complete opening" and "complete closing". If the product is used at intermediate opening, ball and ball seat may be damaged.
• Be careful that the threaded connection between the mating pipe and the internal threaded connections of the valves are in line to avoid piping stresses in the valves.
• During transportation or storage of the product leakage may occur from the packing due to decreasing of tightening pressure by stress relaxation of the packing. Be sure to retighten the stem nut before use.
• When connecting the product and the piping, apply seal agent (such as seal tape) to the screw part of the piping. Use seal agent appropriate for temperature, fluid, etc.
• Slide the lock plate to operate the handle.

Troubleshooting

Trouble	Cause	Remedy
Outside leakage	1. Tightening of the stem nut is loosened. 2. The gland packing is damaged. 3. The stem is damaged.	1. Tighten the stem nut additionally. 2. Replace the product with new one. 3. Replace the product with new one.
Leakage from the ball part on complete closing	1. The ball and/or ball seat is damaged. 2. Foreign substance is stuck.	1. Replace the product with new one. 2. Remove the foreign substance.
Operation torque of the handle is abnormally large	1. Too much tightening of the washer of packing. 2. Foreign substance is stuck on spindle and screw part.	1. Loosen the stem nut and tighten it again until leak stops. 2. Remove the foreign substance.
Abnormal sound	1. Each screw part is loosened.	1. Retighten the loosened parts.